"use strict";
cc._RF.push(module, '8fbabfIyx5Pu7oTUQl0rZuV', 'socket.io');
// script/socket.io.js

"use strict";

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

if (!cc.sys.isNative) {
  !function (e) {
    if ("object" == (typeof exports === "undefined" ? "undefined" : _typeof(exports)) && "undefined" != typeof module) module.exports = e();else if ("function" == typeof define && define.amd) define([], e);else {
      var f;"undefined" != typeof window ? f = window : "undefined" != typeof global ? f = global : "undefined" != typeof self && (f = self), f.io = e();
    }
  }(function () {
    var define, module, exports;return function e(t, n, r) {
      function s(o, u) {
        if (!n[o]) {
          if (!t[o]) {
            var a = typeof require == "function" && require;if (!u && a) return a(o, !0);if (i) return i(o, !0);throw new Error("Cannot find module '" + o + "'");
          }var f = n[o] = { exports: {} };t[o][0].call(f.exports, function (e) {
            var n = t[o][1][e];return s(n ? n : e);
          }, f, f.exports, e, t, n, r);
        }return n[o].exports;
      }var i = typeof require == "function" && require;for (var o = 0; o < r.length; o++) {
        s(r[o]);
      }return s;
    }({ 1: [function (_dereq_, module, exports) {

        /**
         * Module dependencies.
         */

        var url = _dereq_('./url');
        var parser = _dereq_('socket.io-parser');
        var Manager = _dereq_('./manager');
        var debug = _dereq_('debug')('socket.io-client');

        /**
         * Module exports.
         */

        module.exports = exports = lookup;

        /**
         * Managers cache.
         */

        var cache = exports.managers = {};

        /**
         * Looks up an existing `Manager` for multiplexing.
         * If the user summons:
         *
         *   `io('http://localhost/a');`
         *   `io('http://localhost/b');`
         *
         * We reuse the existing instance based on same scheme/port/host,
         * and we initialize sockets for each namespace.
         *
         * @api public
         */

        function lookup(uri, opts) {
          if ((typeof uri === "undefined" ? "undefined" : _typeof(uri)) == 'object') {
            opts = uri;
            uri = undefined;
          }

          opts = opts || {};

          var parsed = url(uri);
          var source = parsed.source;
          var id = parsed.id;
          var path = parsed.path;
          var sameNamespace = cache[id] && path in cache[id].nsps;
          var newConnection = opts.forceNew || opts['force new connection'] || false === opts.multiplex || sameNamespace;

          var io;

          if (newConnection) {
            debug('ignoring socket cache for %s', source);
            io = Manager(source, opts);
          } else {
            if (!cache[id]) {
              debug('new io instance for %s', source);
              cache[id] = Manager(source, opts);
            }
            io = cache[id];
          }

          return io.socket(parsed.path);
        }

        /**
         * Protocol version.
         *
         * @api public
         */

        exports.protocol = parser.protocol;

        /**
         * `connect`.
         *
         * @param {String} uri
         * @api public
         */

        exports.connect = lookup;

        /**
         * Expose constructors for standalone build.
         *
         * @api public
         */

        exports.Manager = _dereq_('./manager');
        exports.Socket = _dereq_('./socket');
      }, { "./manager": 2, "./socket": 4, "./url": 5, "debug": 14, "socket.io-parser": 41 }], 2: [function (_dereq_, module, exports) {

        /**
         * Module dependencies.
         */

        var eio = _dereq_('engine.io-client');
        var Socket = _dereq_('./socket');
        var Emitter = _dereq_('component-emitter');
        var parser = _dereq_('socket.io-parser');
        var on = _dereq_('./on');
        var bind = _dereq_('component-bind');
        var debug = _dereq_('debug')('socket.io-client:manager');
        var indexOf = _dereq_('indexof');
        var Backoff = _dereq_('backo2');

        /**
         * IE6+ hasOwnProperty
         */

        var has = Object.prototype.hasOwnProperty;

        /**
         * Module exports
         */

        module.exports = Manager;

        /**
         * `Manager` constructor.
         *
         * @param {String} engine instance or engine uri/opts
         * @param {Object} options
         * @api public
         */

        function Manager(uri, opts) {
          if (!(this instanceof Manager)) return new Manager(uri, opts);
          if (uri && 'object' == (typeof uri === "undefined" ? "undefined" : _typeof(uri))) {
            opts = uri;
            uri = undefined;
          }
          opts = opts || {};

          opts.path = opts.path || '/socket.io';
          this.nsps = {};
          this.subs = [];
          this.opts = opts;
          this.reconnection(opts.reconnection !== false);
          this.reconnectionAttempts(opts.reconnectionAttempts || Infinity);
          this.reconnectionDelay(opts.reconnectionDelay || 1000);
          this.reconnectionDelayMax(opts.reconnectionDelayMax || 5000);
          this.randomizationFactor(opts.randomizationFactor || 0.5);
          this.backoff = new Backoff({
            min: this.reconnectionDelay(),
            max: this.reconnectionDelayMax(),
            jitter: this.randomizationFactor()
          });
          this.timeout(null == opts.timeout ? 20000 : opts.timeout);
          this.readyState = 'closed';
          this.uri = uri;
          this.connecting = [];
          this.lastPing = null;
          this.encoding = false;
          this.packetBuffer = [];
          this.encoder = new parser.Encoder();
          this.decoder = new parser.Decoder();
          this.autoConnect = opts.autoConnect !== false;
          if (this.autoConnect) this.open();
        }

        /**
         * Propagate given event to sockets and emit on `this`
         *
         * @api private
         */

        Manager.prototype.emitAll = function () {
          this.emit.apply(this, arguments);
          for (var nsp in this.nsps) {
            if (has.call(this.nsps, nsp)) {
              this.nsps[nsp].emit.apply(this.nsps[nsp], arguments);
            }
          }
        };

        /**
         * Update `socket.id` of all sockets
         *
         * @api private
         */

        Manager.prototype.updateSocketIds = function () {
          for (var nsp in this.nsps) {
            if (has.call(this.nsps, nsp)) {
              this.nsps[nsp].id = this.engine.id;
            }
          }
        };

        /**
         * Mix in `Emitter`.
         */

        Emitter(Manager.prototype);

        /**
         * Sets the `reconnection` config.
         *
         * @param {Boolean} true/false if it should automatically reconnect
         * @return {Manager} self or value
         * @api public
         */

        Manager.prototype.reconnection = function (v) {
          if (!arguments.length) return this._reconnection;
          this._reconnection = !!v;
          return this;
        };

        /**
         * Sets the reconnection attempts config.
         *
         * @param {Number} max reconnection attempts before giving up
         * @return {Manager} self or value
         * @api public
         */

        Manager.prototype.reconnectionAttempts = function (v) {
          if (!arguments.length) return this._reconnectionAttempts;
          this._reconnectionAttempts = v;
          return this;
        };

        /**
         * Sets the delay between reconnections.
         *
         * @param {Number} delay
         * @return {Manager} self or value
         * @api public
         */

        Manager.prototype.reconnectionDelay = function (v) {
          if (!arguments.length) return this._reconnectionDelay;
          this._reconnectionDelay = v;
          this.backoff && this.backoff.setMin(v);
          return this;
        };

        Manager.prototype.randomizationFactor = function (v) {
          if (!arguments.length) return this._randomizationFactor;
          this._randomizationFactor = v;
          this.backoff && this.backoff.setJitter(v);
          return this;
        };

        /**
         * Sets the maximum delay between reconnections.
         *
         * @param {Number} delay
         * @return {Manager} self or value
         * @api public
         */

        Manager.prototype.reconnectionDelayMax = function (v) {
          if (!arguments.length) return this._reconnectionDelayMax;
          this._reconnectionDelayMax = v;
          this.backoff && this.backoff.setMax(v);
          return this;
        };

        /**
         * Sets the connection timeout. `false` to disable
         *
         * @return {Manager} self or value
         * @api public
         */

        Manager.prototype.timeout = function (v) {
          if (!arguments.length) return this._timeout;
          this._timeout = v;
          return this;
        };

        /**
         * Starts trying to reconnect if reconnection is enabled and we have not
         * started reconnecting yet
         *
         * @api private
         */

        Manager.prototype.maybeReconnectOnOpen = function () {
          // Only try to reconnect if it's the first time we're connecting
          if (!this.reconnecting && this._reconnection && this.backoff.attempts === 0) {
            // keeps reconnection from firing twice for the same reconnection loop
            this.reconnect();
          }
        };

        /**
         * Sets the current transport `socket`.
         *
         * @param {Function} optional, callback
         * @return {Manager} self
         * @api public
         */

        Manager.prototype.open = Manager.prototype.connect = function (fn) {
          debug('readyState %s', this.readyState);
          if (~this.readyState.indexOf('open')) return this;

          debug('opening %s', this.uri);
          this.engine = eio(this.uri, this.opts);
          var socket = this.engine;
          var self = this;
          this.readyState = 'opening';
          this.skipReconnect = false;

          // emit `open`
          var openSub = on(socket, 'open', function () {
            self.onopen();
            fn && fn();
          });

          // emit `connect_error`
          var errorSub = on(socket, 'error', function (data) {
            debug('connect_error');
            self.cleanup();
            self.readyState = 'closed';
            self.emitAll('connect_error', data);
            if (fn) {
              var err = new Error('Connection error');
              err.data = data;
              fn(err);
            } else {
              // Only do this if there is no fn to handle the error
              self.maybeReconnectOnOpen();
            }
          });

          // emit `connect_timeout`
          if (false !== this._timeout) {
            var timeout = this._timeout;
            debug('connect attempt will timeout after %d', timeout);

            // set timer
            var timer = setTimeout(function () {
              debug('connect attempt timed out after %d', timeout);
              openSub.destroy();
              socket.close();
              socket.emit('error', 'timeout');
              self.emitAll('connect_timeout', timeout);
            }, timeout);

            this.subs.push({
              destroy: function destroy() {
                clearTimeout(timer);
              }
            });
          }

          this.subs.push(openSub);
          this.subs.push(errorSub);

          return this;
        };

        /**
         * Called upon transport open.
         *
         * @api private
         */

        Manager.prototype.onopen = function () {
          debug('open');

          // clear old subs
          this.cleanup();

          // mark as open
          this.readyState = 'open';
          this.emit('open');

          // add new subs
          var socket = this.engine;
          this.subs.push(on(socket, 'data', bind(this, 'ondata')));
          this.subs.push(on(socket, 'ping', bind(this, 'onping')));
          this.subs.push(on(socket, 'pong', bind(this, 'onpong')));
          this.subs.push(on(socket, 'error', bind(this, 'onerror')));
          this.subs.push(on(socket, 'close', bind(this, 'onclose')));
          this.subs.push(on(this.decoder, 'decoded', bind(this, 'ondecoded')));
        };

        /**
         * Called upon a ping.
         *
         * @api private
         */

        Manager.prototype.onping = function () {
          this.lastPing = new Date();
          this.emitAll('ping');
        };

        /**
         * Called upon a packet.
         *
         * @api private
         */

        Manager.prototype.onpong = function () {
          this.emitAll('pong', new Date() - this.lastPing);
        };

        /**
         * Called with data.
         *
         * @api private
         */

        Manager.prototype.ondata = function (data) {
          this.decoder.add(data);
        };

        /**
         * Called when parser fully decodes a packet.
         *
         * @api private
         */

        Manager.prototype.ondecoded = function (packet) {
          this.emit('packet', packet);
        };

        /**
         * Called upon socket error.
         *
         * @api private
         */

        Manager.prototype.onerror = function (err) {
          debug('error', err);
          this.emitAll('error', err);
        };

        /**
         * Creates a new socket for the given `nsp`.
         *
         * @return {Socket}
         * @api public
         */

        Manager.prototype.socket = function (nsp) {
          var socket = this.nsps[nsp];
          if (!socket) {
            socket = new Socket(this, nsp);
            this.nsps[nsp] = socket;
            var self = this;
            socket.on('connecting', onConnecting);
            socket.on('connect', function () {
              socket.id = self.engine.id;
            });

            if (this.autoConnect) {
              // manually call here since connecting evnet is fired before listening
              onConnecting();
            }
          }

          function onConnecting() {
            if (!~indexOf(self.connecting, socket)) {
              self.connecting.push(socket);
            }
          }

          return socket;
        };

        /**
         * Called upon a socket close.
         *
         * @param {Socket} socket
         */

        Manager.prototype.destroy = function (socket) {
          var index = indexOf(this.connecting, socket);
          if (~index) this.connecting.splice(index, 1);
          if (this.connecting.length) return;

          this.close();
        };

        /**
         * Writes a packet.
         *
         * @param {Object} packet
         * @api private
         */

        Manager.prototype.packet = function (packet) {
          debug('writing packet %j', packet);
          var self = this;

          if (!self.encoding) {
            // encode, then write to engine with result
            self.encoding = true;
            this.encoder.encode(packet, function (encodedPackets) {
              for (var i = 0; i < encodedPackets.length; i++) {
                self.engine.write(encodedPackets[i], packet.options);
              }
              self.encoding = false;
              self.processPacketQueue();
            });
          } else {
            // add packet to the queue
            self.packetBuffer.push(packet);
          }
        };

        /**
         * If packet buffer is non-empty, begins encoding the
         * next packet in line.
         *
         * @api private
         */

        Manager.prototype.processPacketQueue = function () {
          if (this.packetBuffer.length > 0 && !this.encoding) {
            var pack = this.packetBuffer.shift();
            this.packet(pack);
          }
        };

        /**
         * Clean up transport subscriptions and packet buffer.
         *
         * @api private
         */

        Manager.prototype.cleanup = function () {
          debug('cleanup');

          var sub;
          while (sub = this.subs.shift()) {
            sub.destroy();
          }this.packetBuffer = [];
          this.encoding = false;
          this.lastPing = null;

          this.decoder.destroy();
        };

        /**
         * Close the current socket.
         *
         * @api private
         */

        Manager.prototype.close = Manager.prototype.disconnect = function () {
          debug('disconnect');
          this.skipReconnect = true;
          this.reconnecting = false;
          if ('opening' == this.readyState) {
            // `onclose` will not fire because
            // an open event never happened
            this.cleanup();
          }
          this.backoff.reset();
          this.readyState = 'closed';
          if (this.engine) this.engine.close();
        };

        /**
         * Called upon engine close.
         *
         * @api private
         */

        Manager.prototype.onclose = function (reason) {
          debug('onclose');

          this.cleanup();
          this.backoff.reset();
          this.readyState = 'closed';
          this.emit('close', reason);

          if (this._reconnection && !this.skipReconnect) {
            this.reconnect();
          }
        };

        /**
         * Attempt a reconnection.
         *
         * @api private
         */

        Manager.prototype.reconnect = function () {
          if (this.reconnecting || this.skipReconnect) return this;

          var self = this;

          if (this.backoff.attempts >= this._reconnectionAttempts) {
            debug('reconnect failed');
            this.backoff.reset();
            this.emitAll('reconnect_failed');
            this.reconnecting = false;
          } else {
            var delay = this.backoff.duration();
            debug('will wait %dms before reconnect attempt', delay);

            this.reconnecting = true;
            var timer = setTimeout(function () {
              if (self.skipReconnect) return;

              debug('attempting reconnect');
              self.emitAll('reconnect_attempt', self.backoff.attempts);
              self.emitAll('reconnecting', self.backoff.attempts);

              // check again for the case socket closed in above events
              if (self.skipReconnect) return;

              self.open(function (err) {
                if (err) {
                  debug('reconnect attempt error');
                  self.reconnecting = false;
                  self.reconnect();
                  self.emitAll('reconnect_error', err.data);
                } else {
                  debug('reconnect success');
                  self.onreconnect();
                }
              });
            }, delay);

            this.subs.push({
              destroy: function destroy() {
                clearTimeout(timer);
              }
            });
          }
        };

        /**
         * Called upon successful reconnect.
         *
         * @api private
         */

        Manager.prototype.onreconnect = function () {
          var attempt = this.backoff.attempts;
          this.reconnecting = false;
          this.backoff.reset();
          this.updateSocketIds();
          this.emitAll('reconnect', attempt);
        };
      }, { "./on": 3, "./socket": 4, "backo2": 8, "component-bind": 11, "component-emitter": 12, "debug": 14, "engine.io-client": 16, "indexof": 33, "socket.io-parser": 41 }], 3: [function (_dereq_, module, exports) {

        /**
         * Module exports.
         */

        module.exports = on;

        /**
         * Helper for subscriptions.
         *
         * @param {Object|EventEmitter} obj with `Emitter` mixin or `EventEmitter`
         * @param {String} event name
         * @param {Function} callback
         * @api public
         */

        function on(obj, ev, fn) {
          obj.on(ev, fn);
          return {
            destroy: function destroy() {
              obj.removeListener(ev, fn);
            }
          };
        }
      }, {}], 4: [function (_dereq_, module, exports) {

        /**
         * Module dependencies.
         */

        var parser = _dereq_('socket.io-parser');
        var Emitter = _dereq_('component-emitter');
        var toArray = _dereq_('to-array');
        var on = _dereq_('./on');
        var bind = _dereq_('component-bind');
        var debug = _dereq_('debug')('socket.io-client:socket');
        var hasBin = _dereq_('has-binary');

        /**
         * Module exports.
         */

        module.exports = exports = Socket;

        /**
         * Internal events (blacklisted).
         * These events can't be emitted by the user.
         *
         * @api private
         */

        var events = {
          connect: 1,
          connect_error: 1,
          connect_timeout: 1,
          connecting: 1,
          disconnect: 1,
          error: 1,
          reconnect: 1,
          reconnect_attempt: 1,
          reconnect_failed: 1,
          reconnect_error: 1,
          reconnecting: 1,
          ping: 1,
          pong: 1
        };

        /**
         * Shortcut to `Emitter#emit`.
         */

        var emit = Emitter.prototype.emit;

        /**
         * `Socket` constructor.
         *
         * @api public
         */

        function Socket(io, nsp) {
          this.io = io;
          this.nsp = nsp;
          this.json = this; // compat
          this.ids = 0;
          this.acks = {};
          this.receiveBuffer = [];
          this.sendBuffer = [];
          this.connected = false;
          this.disconnected = true;
          if (this.io.autoConnect) this.open();
        }

        /**
         * Mix in `Emitter`.
         */

        Emitter(Socket.prototype);

        /**
         * Subscribe to open, close and packet events
         *
         * @api private
         */

        Socket.prototype.subEvents = function () {
          if (this.subs) return;

          var io = this.io;
          this.subs = [on(io, 'open', bind(this, 'onopen')), on(io, 'packet', bind(this, 'onpacket')), on(io, 'close', bind(this, 'onclose'))];
        };

        /**
         * "Opens" the socket.
         *
         * @api public
         */

        Socket.prototype.open = Socket.prototype.connect = function () {
          if (this.connected) return this;

          this.subEvents();
          this.io.open(); // ensure open
          if ('open' == this.io.readyState) this.onopen();
          this.emit('connecting');
          return this;
        };

        /**
         * Sends a `message` event.
         *
         * @return {Socket} self
         * @api public
         */

        Socket.prototype.send = function () {
          var args = toArray(arguments);
          args.unshift('message');
          this.emit.apply(this, args);
          return this;
        };

        /**
         * Override `emit`.
         * If the event is in `events`, it's emitted normally.
         *
         * @param {String} event name
         * @return {Socket} self
         * @api public
         */

        Socket.prototype.emit = function (ev) {
          if (events.hasOwnProperty(ev)) {
            emit.apply(this, arguments);
            return this;
          }

          var args = toArray(arguments);
          var parserType = parser.EVENT; // default
          if (hasBin(args)) {
            parserType = parser.BINARY_EVENT;
          } // binary
          var packet = { type: parserType, data: args };

          packet.options = {};
          packet.options.compress = !this.flags || false !== this.flags.compress;

          // event ack callback
          if ('function' == typeof args[args.length - 1]) {
            debug('emitting packet with ack id %d', this.ids);
            this.acks[this.ids] = args.pop();
            packet.id = this.ids++;
          }

          if (this.connected) {
            this.packet(packet);
          } else {
            this.sendBuffer.push(packet);
          }

          delete this.flags;

          return this;
        };

        /**
         * Sends a packet.
         *
         * @param {Object} packet
         * @api private
         */

        Socket.prototype.packet = function (packet) {
          packet.nsp = this.nsp;
          this.io.packet(packet);
        };

        /**
         * Called upon engine `open`.
         *
         * @api private
         */

        Socket.prototype.onopen = function () {
          debug('transport is open - connecting');

          // write connect packet if necessary
          if ('/' != this.nsp) {
            this.packet({ type: parser.CONNECT });
          }
        };

        /**
         * Called upon engine `close`.
         *
         * @param {String} reason
         * @api private
         */

        Socket.prototype.onclose = function (reason) {
          debug('close (%s)', reason);
          this.connected = false;
          this.disconnected = true;
          delete this.id;
          this.emit('disconnect', reason);
        };

        /**
         * Called with socket packet.
         *
         * @param {Object} packet
         * @api private
         */

        Socket.prototype.onpacket = function (packet) {
          if (packet.nsp != this.nsp) return;

          switch (packet.type) {
            case parser.CONNECT:
              this.onconnect();
              break;

            case parser.EVENT:
              this.onevent(packet);
              break;

            case parser.BINARY_EVENT:
              this.onevent(packet);
              break;

            case parser.ACK:
              this.onack(packet);
              break;

            case parser.BINARY_ACK:
              this.onack(packet);
              break;

            case parser.DISCONNECT:
              this.ondisconnect();
              break;

            case parser.ERROR:
              this.emit('error', packet.data);
              break;
          }
        };

        /**
         * Called upon a server event.
         *
         * @param {Object} packet
         * @api private
         */

        Socket.prototype.onevent = function (packet) {
          var args = packet.data || [];
          debug('emitting event %j', args);

          if (null != packet.id) {
            debug('attaching ack callback to event');
            args.push(this.ack(packet.id));
          }

          if (this.connected) {
            emit.apply(this, args);
          } else {
            this.receiveBuffer.push(args);
          }
        };

        /**
         * Produces an ack callback to emit with an event.
         *
         * @api private
         */

        Socket.prototype.ack = function (id) {
          var self = this;
          var sent = false;
          return function () {
            // prevent double callbacks
            if (sent) return;
            sent = true;
            var args = toArray(arguments);
            debug('sending ack %j', args);

            var type = hasBin(args) ? parser.BINARY_ACK : parser.ACK;
            self.packet({
              type: type,
              id: id,
              data: args
            });
          };
        };

        /**
         * Called upon a server acknowlegement.
         *
         * @param {Object} packet
         * @api private
         */

        Socket.prototype.onack = function (packet) {
          var ack = this.acks[packet.id];
          if ('function' == typeof ack) {
            debug('calling ack %s with %j', packet.id, packet.data);
            ack.apply(this, packet.data);
            delete this.acks[packet.id];
          } else {
            debug('bad ack %s', packet.id);
          }
        };

        /**
         * Called upon server connect.
         *
         * @api private
         */

        Socket.prototype.onconnect = function () {
          this.connected = true;
          this.disconnected = false;
          this.emit('connect');
          this.emitBuffered();
        };

        /**
         * Emit buffered events (received and emitted).
         *
         * @api private
         */

        Socket.prototype.emitBuffered = function () {
          var i;
          for (i = 0; i < this.receiveBuffer.length; i++) {
            emit.apply(this, this.receiveBuffer[i]);
          }
          this.receiveBuffer = [];

          for (i = 0; i < this.sendBuffer.length; i++) {
            this.packet(this.sendBuffer[i]);
          }
          this.sendBuffer = [];
        };

        /**
         * Called upon server disconnect.
         *
         * @api private
         */

        Socket.prototype.ondisconnect = function () {
          debug('server disconnect (%s)', this.nsp);
          this.destroy();
          this.onclose('io server disconnect');
        };

        /**
         * Called upon forced client/server side disconnections,
         * this method ensures the manager stops tracking us and
         * that reconnections don't get triggered for this.
         *
         * @api private.
         */

        Socket.prototype.destroy = function () {
          if (this.subs) {
            // clean subscriptions to avoid reconnections
            for (var i = 0; i < this.subs.length; i++) {
              this.subs[i].destroy();
            }
            this.subs = null;
          }

          this.io.destroy(this);
        };

        /**
         * Disconnects the socket manually.
         *
         * @return {Socket} self
         * @api public
         */

        Socket.prototype.close = Socket.prototype.disconnect = function () {
          if (this.connected) {
            debug('performing disconnect (%s)', this.nsp);
            this.packet({ type: parser.DISCONNECT });
          }

          // remove socket from pool
          this.destroy();

          if (this.connected) {
            // fire events
            this.onclose('io client disconnect');
          }
          return this;
        };

        /**
         * Sets the compress flag.
         *
         * @param {Boolean} if `true`, compresses the sending data
         * @return {Socket} self
         * @api public
         */

        Socket.prototype.compress = function (compress) {
          this.flags = this.flags || {};
          this.flags.compress = compress;
          return this;
        };
      }, { "./on": 3, "component-bind": 11, "component-emitter": 12, "debug": 14, "has-binary": 31, "socket.io-parser": 41, "to-array": 44 }], 5: [function (_dereq_, module, exports) {
        (function (global) {

          /**
           * Module dependencies.
           */

          var parseuri = _dereq_('parseuri');
          var debug = _dereq_('debug')('socket.io-client:url');

          /**
           * Module exports.
           */

          module.exports = url;

          /**
           * URL parser.
           *
           * @param {String} url
           * @param {Object} An object meant to mimic window.location.
           *                 Defaults to window.location.
           * @api public
           */

          function url(uri, loc) {
            var obj = uri;

            // default to window.location
            var loc = loc || global.location;
            if (null == uri) uri = loc.protocol + '//' + loc.host;

            // relative path support
            if ('string' == typeof uri) {
              if ('/' == uri.charAt(0)) {
                if ('/' == uri.charAt(1)) {
                  uri = loc.protocol + uri;
                } else {
                  uri = loc.host + uri;
                }
              }

              if (!/^(https?|wss?):\/\//.test(uri)) {
                debug('protocol-less url %s', uri);
                if ('undefined' != typeof loc) {
                  uri = loc.protocol + '//' + uri;
                } else {
                  uri = 'https://' + uri;
                }
              }

              // parse
              debug('parse %s', uri);
              obj = parseuri(uri);
            }

            // make sure we treat `localhost:80` and `localhost` equally
            if (!obj.port) {
              if (/^(http|ws)$/.test(obj.protocol)) {
                obj.port = '80';
              } else if (/^(http|ws)s$/.test(obj.protocol)) {
                obj.port = '443';
              }
            }

            obj.path = obj.path || '/';

            var ipv6 = obj.host.indexOf(':') !== -1;
            var host = ipv6 ? '[' + obj.host + ']' : obj.host;

            // define unique id
            obj.id = obj.protocol + '://' + host + ':' + obj.port;
            // define href
            obj.href = obj.protocol + '://' + host + (loc && loc.port == obj.port ? '' : ':' + obj.port);

            return obj;
          }
        }).call(this, typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {});
      }, { "debug": 14, "parseuri": 39 }], 6: [function (_dereq_, module, exports) {
        module.exports = after;

        function after(count, callback, err_cb) {
          var bail = false;
          err_cb = err_cb || noop;
          proxy.count = count;

          return count === 0 ? callback() : proxy;

          function proxy(err, result) {
            if (proxy.count <= 0) {
              throw new Error('after called too many times');
            }
            --proxy.count;

            // after first error, rest are passed to err_cb
            if (err) {
              bail = true;
              callback(err);
              // future error callbacks will go to error handler
              callback = err_cb;
            } else if (proxy.count === 0 && !bail) {
              callback(null, result);
            }
          }
        }

        function noop() {}
      }, {}], 7: [function (_dereq_, module, exports) {
        /**
         * An abstraction for slicing an arraybuffer even when
         * ArrayBuffer.prototype.slice is not supported
         *
         * @api public
         */

        module.exports = function (arraybuffer, start, end) {
          var bytes = arraybuffer.byteLength;
          start = start || 0;
          end = end || bytes;

          if (arraybuffer.slice) {
            return arraybuffer.slice(start, end);
          }

          if (start < 0) {
            start += bytes;
          }
          if (end < 0) {
            end += bytes;
          }
          if (end > bytes) {
            end = bytes;
          }

          if (start >= bytes || start >= end || bytes === 0) {
            return new ArrayBuffer(0);
          }

          var abv = new Uint8Array(arraybuffer);
          var result = new Uint8Array(end - start);
          for (var i = start, ii = 0; i < end; i++, ii++) {
            result[ii] = abv[i];
          }
          return result.buffer;
        };
      }, {}], 8: [function (_dereq_, module, exports) {

        /**
         * Expose `Backoff`.
         */

        module.exports = Backoff;

        /**
         * Initialize backoff timer with `opts`.
         *
         * - `min` initial timeout in milliseconds [100]
         * - `max` max timeout [10000]
         * - `jitter` [0]
         * - `factor` [2]
         *
         * @param {Object} opts
         * @api public
         */

        function Backoff(opts) {
          opts = opts || {};
          this.ms = opts.min || 100;
          this.max = opts.max || 10000;
          this.factor = opts.factor || 2;
          this.jitter = opts.jitter > 0 && opts.jitter <= 1 ? opts.jitter : 0;
          this.attempts = 0;
        }

        /**
         * Return the backoff duration.
         *
         * @return {Number}
         * @api public
         */

        Backoff.prototype.duration = function () {
          var ms = this.ms * Math.pow(this.factor, this.attempts++);
          if (this.jitter) {
            var rand = Math.random();
            var deviation = Math.floor(rand * this.jitter * ms);
            ms = (Math.floor(rand * 10) & 1) == 0 ? ms - deviation : ms + deviation;
          }
          return Math.min(ms, this.max) | 0;
        };

        /**
         * Reset the number of attempts.
         *
         * @api public
         */

        Backoff.prototype.reset = function () {
          this.attempts = 0;
        };

        /**
         * Set the minimum duration
         *
         * @api public
         */

        Backoff.prototype.setMin = function (min) {
          this.ms = min;
        };

        /**
         * Set the maximum duration
         *
         * @api public
         */

        Backoff.prototype.setMax = function (max) {
          this.max = max;
        };

        /**
         * Set the jitter
         *
         * @api public
         */

        Backoff.prototype.setJitter = function (jitter) {
          this.jitter = jitter;
        };
      }, {}], 9: [function (_dereq_, module, exports) {
        /*
         * base64-arraybuffer
         * https://github.com/niklasvh/base64-arraybuffer
         *
         * Copyright (c) 2012 Niklas von Hertzen
         * Licensed under the MIT license.
         */
        (function (chars) {
          "use strict";

          exports.encode = function (arraybuffer) {
            var bytes = new Uint8Array(arraybuffer),
                i,
                len = bytes.buffer.byteLength,
                base64 = "";

            for (i = 0; i < len; i += 3) {
              base64 += chars[bytes.buffer[i] >> 2];
              base64 += chars[(bytes.buffer[i] & 3) << 4 | bytes.buffer[i + 1] >> 4];
              base64 += chars[(bytes.buffer[i + 1] & 15) << 2 | bytes.buffer[i + 2] >> 6];
              base64 += chars[bytes.buffer[i + 2] & 63];
            }

            if (len % 3 === 2) {
              base64 = base64.substring(0, base64.length - 1) + "=";
            } else if (len % 3 === 1) {
              base64 = base64.substring(0, base64.length - 2) + "==";
            }

            return base64;
          };

          exports.decode = function (base64) {
            var bufferLength = base64.length * 0.75,
                len = base64.length,
                i,
                p = 0,
                encoded1,
                encoded2,
                encoded3,
                encoded4;

            if (base64[base64.length - 1] === "=") {
              bufferLength--;
              if (base64[base64.length - 2] === "=") {
                bufferLength--;
              }
            }

            var arraybuffer = new ArrayBuffer(bufferLength),
                bytes = new Uint8Array(arraybuffer);

            for (i = 0; i < len; i += 4) {
              encoded1 = chars.indexOf(base64[i]);
              encoded2 = chars.indexOf(base64[i + 1]);
              encoded3 = chars.indexOf(base64[i + 2]);
              encoded4 = chars.indexOf(base64[i + 3]);

              bytes[p++] = encoded1 << 2 | encoded2 >> 4;
              bytes[p++] = (encoded2 & 15) << 4 | encoded3 >> 2;
              bytes[p++] = (encoded3 & 3) << 6 | encoded4 & 63;
            }

            return arraybuffer;
          };
        })("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/");
      }, {}], 10: [function (_dereq_, module, exports) {
        (function (global) {
          /**
           * Create a blob builder even when vendor prefixes exist
           */

          var BlobBuilder = global.BlobBuilder || global.WebKitBlobBuilder || global.MSBlobBuilder || global.MozBlobBuilder;

          /**
           * Check if Blob constructor is supported
           */

          var blobSupported = function () {
            try {
              var a = new Blob(['hi']);
              return a.size === 2;
            } catch (e) {
              return false;
            }
          }();

          /**
           * Check if Blob constructor supports ArrayBufferViews
           * Fails in Safari 6, so we need to map to ArrayBuffers there.
           */

          var blobSupportsArrayBufferView = blobSupported && function () {
            try {
              var b = new Blob([new Uint8Array([1, 2])]);
              return b.size === 2;
            } catch (e) {
              return false;
            }
          }();

          /**
           * Check if BlobBuilder is supported
           */

          var blobBuilderSupported = BlobBuilder && BlobBuilder.prototype.append && BlobBuilder.prototype.getBlob;

          /**
           * Helper function that maps ArrayBufferViews to ArrayBuffers
           * Used by BlobBuilder constructor and old browsers that didn't
           * support it in the Blob constructor.
           */

          function mapArrayBufferViews(ary) {
            for (var i = 0; i < ary.length; i++) {
              var chunk = ary[i];
              if (chunk.buffer instanceof ArrayBuffer) {
                var buf = chunk.buffer;

                // if this is a subarray, make a copy so we only
                // include the subarray region from the underlying buffer
                if (chunk.byteLength !== buf.byteLength) {
                  var copy = new Uint8Array(chunk.byteLength);
                  copy.set(new Uint8Array(buf, chunk.byteOffset, chunk.byteLength));
                  buf = copy.buffer;
                }

                ary[i] = buf;
              }
            }
          }

          function BlobBuilderConstructor(ary, options) {
            options = options || {};

            var bb = new BlobBuilder();
            mapArrayBufferViews(ary);

            for (var i = 0; i < ary.length; i++) {
              bb.append(ary[i]);
            }

            return options.type ? bb.getBlob(options.type) : bb.getBlob();
          };

          function BlobConstructor(ary, options) {
            mapArrayBufferViews(ary);
            return new Blob(ary, options || {});
          };

          module.exports = function () {
            if (blobSupported) {
              return blobSupportsArrayBufferView ? global.Blob : BlobConstructor;
            } else if (blobBuilderSupported) {
              return BlobBuilderConstructor;
            } else {
              return undefined;
            }
          }();
        }).call(this, typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {});
      }, {}], 11: [function (_dereq_, module, exports) {
        /**
         * Slice reference.
         */

        var slice = [].slice;

        /**
         * Bind `obj` to `fn`.
         *
         * @param {Object} obj
         * @param {Function|String} fn or string
         * @return {Function}
         * @api public
         */

        module.exports = function (obj, fn) {
          if ('string' == typeof fn) fn = obj[fn];
          if ('function' != typeof fn) throw new Error('bind() requires a function');
          var args = slice.call(arguments, 2);
          return function () {
            return fn.apply(obj, args.concat(slice.call(arguments)));
          };
        };
      }, {}], 12: [function (_dereq_, module, exports) {

        /**
         * Expose `Emitter`.
         */

        module.exports = Emitter;

        /**
         * Initialize a new `Emitter`.
         *
         * @api public
         */

        function Emitter(obj) {
          if (obj) return mixin(obj);
        };

        /**
         * Mixin the emitter properties.
         *
         * @param {Object} obj
         * @return {Object}
         * @api private
         */

        function mixin(obj) {
          for (var key in Emitter.prototype) {
            obj[key] = Emitter.prototype[key];
          }
          return obj;
        }

        /**
         * Listen on the given `event` with `fn`.
         *
         * @param {String} event
         * @param {Function} fn
         * @return {Emitter}
         * @api public
         */

        Emitter.prototype.on = Emitter.prototype.addEventListener = function (event, fn) {
          this._callbacks = this._callbacks || {};
          (this._callbacks['$' + event] = this._callbacks['$' + event] || []).push(fn);
          return this;
        };

        /**
         * Adds an `event` listener that will be invoked a single
         * time then automatically removed.
         *
         * @param {String} event
         * @param {Function} fn
         * @return {Emitter}
         * @api public
         */

        Emitter.prototype.once = function (event, fn) {
          function on() {
            this.off(event, on);
            fn.apply(this, arguments);
          }

          on.fn = fn;
          this.on(event, on);
          return this;
        };

        /**
         * Remove the given callback for `event` or all
         * registered callbacks.
         *
         * @param {String} event
         * @param {Function} fn
         * @return {Emitter}
         * @api public
         */

        Emitter.prototype.off = Emitter.prototype.removeListener = Emitter.prototype.removeAllListeners = Emitter.prototype.removeEventListener = function (event, fn) {
          this._callbacks = this._callbacks || {};

          // all
          if (0 == arguments.length) {
            this._callbacks = {};
            return this;
          }

          // specific event
          var callbacks = this._callbacks['$' + event];
          if (!callbacks) return this;

          // remove all handlers
          if (1 == arguments.length) {
            delete this._callbacks['$' + event];
            return this;
          }

          // remove specific handler
          var cb;
          for (var i = 0; i < callbacks.length; i++) {
            cb = callbacks[i];
            if (cb === fn || cb.fn === fn) {
              callbacks.splice(i, 1);
              break;
            }
          }
          return this;
        };

        /**
         * Emit `event` with the given args.
         *
         * @param {String} event
         * @param {Mixed} ...
         * @return {Emitter}
         */

        Emitter.prototype.emit = function (event) {
          this._callbacks = this._callbacks || {};
          var args = [].slice.call(arguments, 1),
              callbacks = this._callbacks['$' + event];

          if (callbacks) {
            callbacks = callbacks.slice(0);
            for (var i = 0, len = callbacks.length; i < len; ++i) {
              callbacks[i].apply(this, args);
            }
          }

          return this;
        };

        /**
         * Return array of callbacks for `event`.
         *
         * @param {String} event
         * @return {Array}
         * @api public
         */

        Emitter.prototype.listeners = function (event) {
          this._callbacks = this._callbacks || {};
          return this._callbacks['$' + event] || [];
        };

        /**
         * Check if this emitter has `event` handlers.
         *
         * @param {String} event
         * @return {Boolean}
         * @api public
         */

        Emitter.prototype.hasListeners = function (event) {
          return !!this.listeners(event).length;
        };
      }, {}], 13: [function (_dereq_, module, exports) {

        module.exports = function (a, b) {
          var fn = function fn() {};
          fn.prototype = b.prototype;
          a.prototype = new fn();
          a.prototype.constructor = a;
        };
      }, {}], 14: [function (_dereq_, module, exports) {

        /**
         * This is the web browser implementation of `debug()`.
         *
         * Expose `debug()` as the module.
         */

        exports = module.exports = _dereq_('./debug');
        exports.log = log;
        exports.formatArgs = formatArgs;
        exports.save = save;
        exports.load = load;
        exports.useColors = useColors;
        exports.storage = 'undefined' != typeof chrome && 'undefined' != typeof chrome.storage ? chrome.storage.local : localstorage();

        /**
         * Colors.
         */

        exports.colors = ['lightseagreen', 'forestgreen', 'goldenrod', 'dodgerblue', 'darkorchid', 'crimson'];

        /**
         * Currently only WebKit-based Web Inspectors, Firefox >= v31,
         * and the Firebug extension (any Firefox version) are known
         * to support "%c" CSS customizations.
         *
         * TODO: add a `localStorage` variable to explicitly enable/disable colors
         */

        function useColors() {
          // is webkit? http://stackoverflow.com/a/16459606/376773
          return 'WebkitAppearance' in document.documentElement.style ||
          // is firebug? http://stackoverflow.com/a/398120/376773
          window.console && (console.firebug || console.exception && console.table) ||
          // is firefox >= v31?
          // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
          navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31;
        }

        /**
         * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
         */

        exports.formatters.j = function (v) {
          return JSON.stringify(v);
        };

        /**
         * Colorize log arguments if enabled.
         *
         * @api public
         */

        function formatArgs() {
          var args = arguments;
          var useColors = this.useColors;

          args[0] = (useColors ? '%c' : '') + this.namespace + (useColors ? ' %c' : ' ') + args[0] + (useColors ? '%c ' : ' ') + '+' + exports.humanize(this.diff);

          if (!useColors) return args;

          var c = 'color: ' + this.color;
          args = [args[0], c, 'color: inherit'].concat(Array.prototype.slice.call(args, 1));

          // the final "%c" is somewhat tricky, because there could be other
          // arguments passed either before or after the %c, so we need to
          // figure out the correct index to insert the CSS into
          var index = 0;
          var lastC = 0;
          args[0].replace(/%[a-z%]/g, function (match) {
            if ('%%' === match) return;
            index++;
            if ('%c' === match) {
              // we only are interested in the *last* %c
              // (the user may have provided their own)
              lastC = index;
            }
          });

          args.splice(lastC, 0, c);
          return args;
        }

        /**
         * Invokes `console.log()` when available.
         * No-op when `console.log` is not a "function".
         *
         * @api public
         */

        function log() {
          // this hackery is required for IE8/9, where
          // the `console.log` function doesn't have 'apply'
          return 'object' === (typeof console === "undefined" ? "undefined" : _typeof(console)) && console.log && Function.prototype.apply.call(console.log, console, arguments);
        }

        /**
         * Save `namespaces`.
         *
         * @param {String} namespaces
         * @api private
         */

        function save(namespaces) {
          try {
            if (null == namespaces) {
              exports.storage.removeItem('debug');
            } else {
              exports.storage.debug = namespaces;
            }
          } catch (e) {}
        }

        /**
         * Load `namespaces`.
         *
         * @return {String} returns the previously persisted debug modes
         * @api private
         */

        function load() {
          var r;
          try {
            r = exports.storage.debug;
          } catch (e) {}
          return r;
        }

        /**
         * Enable namespaces listed in `localStorage.debug` initially.
         */

        exports.enable(load());

        /**
         * Localstorage attempts to return the localstorage.
         *
         * This is necessary because safari throws
         * when a user disables cookies/localstorage
         * and you attempt to access it.
         *
         * @return {LocalStorage}
         * @api private
         */

        function localstorage() {
          try {
            return window.localStorage;
          } catch (e) {}
        }
      }, { "./debug": 15 }], 15: [function (_dereq_, module, exports) {

        /**
         * This is the common logic for both the Node.js and web browser
         * implementations of `debug()`.
         *
         * Expose `debug()` as the module.
         */

        exports = module.exports = debug;
        exports.coerce = coerce;
        exports.disable = disable;
        exports.enable = enable;
        exports.enabled = enabled;
        exports.humanize = _dereq_('ms');

        /**
         * The currently active debug mode names, and names to skip.
         */

        exports.names = [];
        exports.skips = [];

        /**
         * Map of special "%n" handling functions, for the debug "format" argument.
         *
         * Valid key names are a single, lowercased letter, i.e. "n".
         */

        exports.formatters = {};

        /**
         * Previously assigned color.
         */

        var prevColor = 0;

        /**
         * Previous log timestamp.
         */

        var prevTime;

        /**
         * Select a color.
         *
         * @return {Number}
         * @api private
         */

        function selectColor() {
          return exports.colors[prevColor++ % exports.colors.length];
        }

        /**
         * Create a debugger with the given `namespace`.
         *
         * @param {String} namespace
         * @return {Function}
         * @api public
         */

        function debug(namespace) {

          // define the `disabled` version
          function disabled() {}
          disabled.enabled = false;

          // define the `enabled` version
          function enabled() {

            var self = enabled;

            // set `diff` timestamp
            var curr = +new Date();
            var ms = curr - (prevTime || curr);
            self.diff = ms;
            self.prev = prevTime;
            self.curr = curr;
            prevTime = curr;

            // add the `color` if not set
            if (null == self.useColors) self.useColors = exports.useColors();
            if (null == self.color && self.useColors) self.color = selectColor();

            var args = Array.prototype.slice.call(arguments);

            args[0] = exports.coerce(args[0]);

            if ('string' !== typeof args[0]) {
              // anything else let's inspect with %o
              args = ['%o'].concat(args);
            }

            // apply any `formatters` transformations
            var index = 0;
            args[0] = args[0].replace(/%([a-z%])/g, function (match, format) {
              // if we encounter an escaped % then don't increase the array index
              if (match === '%%') return match;
              index++;
              var formatter = exports.formatters[format];
              if ('function' === typeof formatter) {
                var val = args[index];
                match = formatter.call(self, val);

                // now we need to remove `args[index]` since it's inlined in the `format`
                args.splice(index, 1);
                index--;
              }
              return match;
            });

            if ('function' === typeof exports.formatArgs) {
              args = exports.formatArgs.apply(self, args);
            }
            var logFn = enabled.log || exports.log || console.log.bind(console);
            logFn.apply(self, args);
          }
          enabled.enabled = true;

          var fn = exports.enabled(namespace) ? enabled : disabled;

          fn.namespace = namespace;

          return fn;
        }

        /**
         * Enables a debug mode by namespaces. This can include modes
         * separated by a colon and wildcards.
         *
         * @param {String} namespaces
         * @api public
         */

        function enable(namespaces) {
          exports.save(namespaces);

          var split = (namespaces || '').split(/[\s,]+/);
          var len = split.length;

          for (var i = 0; i < len; i++) {
            if (!split[i]) continue; // ignore empty strings
            namespaces = split[i].replace(/\*/g, '.*?');
            if (namespaces[0] === '-') {
              exports.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));
            } else {
              exports.names.push(new RegExp('^' + namespaces + '$'));
            }
          }
        }

        /**
         * Disable debug output.
         *
         * @api public
         */

        function disable() {
          exports.enable('');
        }

        /**
         * Returns true if the given mode name is enabled, false otherwise.
         *
         * @param {String} name
         * @return {Boolean}
         * @api public
         */

        function enabled(name) {
          var i, len;
          for (i = 0, len = exports.skips.length; i < len; i++) {
            if (exports.skips[i].test(name)) {
              return false;
            }
          }
          for (i = 0, len = exports.names.length; i < len; i++) {
            if (exports.names[i].test(name)) {
              return true;
            }
          }
          return false;
        }

        /**
         * Coerce `val`.
         *
         * @param {Mixed} val
         * @return {Mixed}
         * @api private
         */

        function coerce(val) {
          if (val instanceof Error) return val.stack || val.message;
          return val;
        }
      }, { "ms": 36 }], 16: [function (_dereq_, module, exports) {

        module.exports = _dereq_('./lib/');
      }, { "./lib/": 17 }], 17: [function (_dereq_, module, exports) {

        module.exports = _dereq_('./socket');

        /**
         * Exports parser
         *
         * @api public
         *
         */
        module.exports.parser = _dereq_('engine.io-parser');
      }, { "./socket": 18, "engine.io-parser": 27 }], 18: [function (_dereq_, module, exports) {
        (function (global) {
          /**
           * Module dependencies.
           */

          var transports = _dereq_('./transports');
          var Emitter = _dereq_('component-emitter');
          var debug = _dereq_('debug')('engine.io-client:socket');
          var index = _dereq_('indexof');
          var parser = _dereq_('engine.io-parser');
          var parseuri = _dereq_('parseuri');
          var parsejson = _dereq_('parsejson');
          var parseqs = _dereq_('parseqs');

          /**
           * Module exports.
           */

          module.exports = Socket;

          /**
           * Noop function.
           *
           * @api private
           */

          function noop() {}

          /**
           * Socket constructor.
           *
           * @param {String|Object} uri or options
           * @param {Object} options
           * @api public
           */

          function Socket(uri, opts) {
            if (!(this instanceof Socket)) return new Socket(uri, opts);

            opts = opts || {};

            if (uri && 'object' == (typeof uri === "undefined" ? "undefined" : _typeof(uri))) {
              opts = uri;
              uri = null;
            }

            if (uri) {
              uri = parseuri(uri);
              opts.hostname = uri.host;
              opts.secure = uri.protocol == 'https' || uri.protocol == 'wss';
              opts.port = uri.port;
              if (uri.query) opts.query = uri.query;
            } else if (opts.host) {
              opts.hostname = parseuri(opts.host).host;
            }

            this.secure = null != opts.secure ? opts.secure : global.location && 'https:' == location.protocol;

            if (opts.hostname && !opts.port) {
              // if no port is specified manually, use the protocol default
              opts.port = this.secure ? '443' : '80';
            }

            this.agent = opts.agent || false;
            this.hostname = opts.hostname || (global.location ? location.hostname : 'localhost');
            this.port = opts.port || (global.location && location.port ? location.port : this.secure ? 443 : 80);
            this.query = opts.query || {};
            if ('string' == typeof this.query) this.query = parseqs.decode(this.query);
            this.upgrade = false !== opts.upgrade;
            this.path = (opts.path || '/engine.io').replace(/\/$/, '') + '/';
            this.forceJSONP = !!opts.forceJSONP;
            this.jsonp = false !== opts.jsonp;
            this.forceBase64 = !!opts.forceBase64;
            this.enablesXDR = !!opts.enablesXDR;
            this.timestampParam = opts.timestampParam || 't';
            this.timestampRequests = opts.timestampRequests;
            this.transports = opts.transports || ['polling', 'websocket'];
            this.readyState = '';
            this.writeBuffer = [];
            this.policyPort = opts.policyPort || 843;
            this.rememberUpgrade = opts.rememberUpgrade || false;
            this.binaryType = null;
            this.onlyBinaryUpgrades = opts.onlyBinaryUpgrades;
            this.perMessageDeflate = false !== opts.perMessageDeflate ? opts.perMessageDeflate || {} : false;

            if (true === this.perMessageDeflate) this.perMessageDeflate = {};
            if (this.perMessageDeflate && null == this.perMessageDeflate.threshold) {
              this.perMessageDeflate.threshold = 1024;
            }

            // SSL options for Node.js client
            this.pfx = opts.pfx || null;
            this.key = opts.key || null;
            this.passphrase = opts.passphrase || null;
            this.cert = opts.cert || null;
            this.ca = opts.ca || null;
            this.ciphers = opts.ciphers || null;
            this.rejectUnauthorized = opts.rejectUnauthorized === undefined ? null : opts.rejectUnauthorized;

            // other options for Node.js client
            var freeGlobal = (typeof global === "undefined" ? "undefined" : _typeof(global)) == 'object' && global;
            if (freeGlobal.global === freeGlobal) {
              if (opts.extraHeaders && Object.keys(opts.extraHeaders).length > 0) {
                this.extraHeaders = opts.extraHeaders;
              }
            }

            this.open();
          }

          Socket.priorWebsocketSuccess = false;

          /**
           * Mix in `Emitter`.
           */

          Emitter(Socket.prototype);

          /**
           * Protocol version.
           *
           * @api public
           */

          Socket.protocol = parser.protocol; // this is an int

          /**
           * Expose deps for legacy compatibility
           * and standalone browser access.
           */

          Socket.Socket = Socket;
          Socket.Transport = _dereq_('./transport');
          Socket.transports = _dereq_('./transports');
          Socket.parser = _dereq_('engine.io-parser');

          /**
           * Creates transport of the given type.
           *
           * @param {String} transport name
           * @return {Transport}
           * @api private
           */

          Socket.prototype.createTransport = function (name) {
            debug('creating transport "%s"', name);
            var query = clone(this.query);

            // append engine.io protocol identifier
            query.EIO = parser.protocol;

            // transport name
            query.transport = name;

            // session id if we already have one
            if (this.id) query.sid = this.id;

            var transport = new transports[name]({
              agent: this.agent,
              hostname: this.hostname,
              port: this.port,
              secure: this.secure,
              path: this.path,
              query: query,
              forceJSONP: this.forceJSONP,
              jsonp: this.jsonp,
              forceBase64: this.forceBase64,
              enablesXDR: this.enablesXDR,
              timestampRequests: this.timestampRequests,
              timestampParam: this.timestampParam,
              policyPort: this.policyPort,
              socket: this,
              pfx: this.pfx,
              key: this.key,
              passphrase: this.passphrase,
              cert: this.cert,
              ca: this.ca,
              ciphers: this.ciphers,
              rejectUnauthorized: this.rejectUnauthorized,
              perMessageDeflate: this.perMessageDeflate,
              extraHeaders: this.extraHeaders
            });

            return transport;
          };

          function clone(obj) {
            var o = {};
            for (var i in obj) {
              if (obj.hasOwnProperty(i)) {
                o[i] = obj[i];
              }
            }
            return o;
          }

          /**
           * Initializes transport to use and starts probe.
           *
           * @api private
           */
          Socket.prototype.open = function () {
            var transport;
            if (this.rememberUpgrade && Socket.priorWebsocketSuccess && this.transports.indexOf('websocket') != -1) {
              transport = 'websocket';
            } else if (0 === this.transports.length) {
              // Emit error on next tick so it can be listened to
              var self = this;
              setTimeout(function () {
                self.emit('error', 'No transports available');
              }, 0);
              return;
            } else {
              transport = this.transports[0];
            }
            this.readyState = 'opening';

            // Retry with the next transport if the transport is disabled (jsonp: false)
            try {
              transport = this.createTransport(transport);
            } catch (e) {
              this.transports.shift();
              this.open();
              return;
            }

            transport.open();
            this.setTransport(transport);
          };

          /**
           * Sets the current transport. Disables the existing one (if any).
           *
           * @api private
           */

          Socket.prototype.setTransport = function (transport) {
            debug('setting transport %s', transport.name);
            var self = this;

            if (this.transport) {
              debug('clearing existing transport %s', this.transport.name);
              this.transport.removeAllListeners();
            }

            // set up transport
            this.transport = transport;

            // set up transport listeners
            transport.on('drain', function () {
              self.onDrain();
            }).on('packet', function (packet) {
              self.onPacket(packet);
            }).on('error', function (e) {
              self.onError(e);
            }).on('close', function () {
              self.onClose('transport close');
            });
          };

          /**
           * Probes a transport.
           *
           * @param {String} transport name
           * @api private
           */

          Socket.prototype.probe = function (name) {
            debug('probing transport "%s"', name);
            var transport = this.createTransport(name, { probe: 1 }),
                failed = false,
                self = this;

            Socket.priorWebsocketSuccess = false;

            function onTransportOpen() {
              if (self.onlyBinaryUpgrades) {
                var upgradeLosesBinary = !this.supportsBinary && self.transport.supportsBinary;
                failed = failed || upgradeLosesBinary;
              }
              if (failed) return;

              debug('probe transport "%s" opened', name);
              transport.send([{ type: 'ping', data: 'probe' }]);
              transport.once('packet', function (msg) {
                if (failed) return;
                if ('pong' == msg.type && 'probe' == msg.data) {
                  debug('probe transport "%s" pong', name);
                  self.upgrading = true;
                  self.emit('upgrading', transport);
                  if (!transport) return;
                  Socket.priorWebsocketSuccess = 'websocket' == transport.name;

                  debug('pausing current transport "%s"', self.transport.name);
                  self.transport.pause(function () {
                    if (failed) return;
                    if ('closed' == self.readyState) return;
                    debug('changing transport and sending upgrade packet');

                    cleanup();

                    self.setTransport(transport);
                    transport.send([{ type: 'upgrade' }]);
                    self.emit('upgrade', transport);
                    transport = null;
                    self.upgrading = false;
                    self.flush();
                  });
                } else {
                  debug('probe transport "%s" failed', name);
                  var err = new Error('probe error');
                  err.transport = transport.name;
                  self.emit('upgradeError', err);
                }
              });
            }

            function freezeTransport() {
              if (failed) return;

              // Any callback called by transport should be ignored since now
              failed = true;

              cleanup();

              transport.close();
              transport = null;
            }

            //Handle any error that happens while probing
            function onerror(err) {
              var error = new Error('probe error: ' + err);
              error.transport = transport.name;

              freezeTransport();

              debug('probe transport "%s" failed because of error: %s', name, err);

              self.emit('upgradeError', error);
            }

            function onTransportClose() {
              onerror("transport closed");
            }

            //When the socket is closed while we're probing
            function onclose() {
              onerror("socket closed");
            }

            //When the socket is upgraded while we're probing
            function onupgrade(to) {
              if (transport && to.name != transport.name) {
                debug('"%s" works - aborting "%s"', to.name, transport.name);
                freezeTransport();
              }
            }

            //Remove all listeners on the transport and on self
            function cleanup() {
              transport.removeListener('open', onTransportOpen);
              transport.removeListener('error', onerror);
              transport.removeListener('close', onTransportClose);
              self.removeListener('close', onclose);
              self.removeListener('upgrading', onupgrade);
            }

            transport.once('open', onTransportOpen);
            transport.once('error', onerror);
            transport.once('close', onTransportClose);

            this.once('close', onclose);
            this.once('upgrading', onupgrade);

            transport.open();
          };

          /**
           * Called when connection is deemed open.
           *
           * @api public
           */

          Socket.prototype.onOpen = function () {
            debug('socket open');
            this.readyState = 'open';
            Socket.priorWebsocketSuccess = 'websocket' == this.transport.name;
            this.emit('open');
            this.flush();

            // we check for `readyState` in case an `open`
            // listener already closed the socket
            if ('open' == this.readyState && this.upgrade && this.transport.pause) {
              debug('starting upgrade probes');
              for (var i = 0, l = this.upgrades.length; i < l; i++) {
                this.probe(this.upgrades[i]);
              }
            }
          };

          /**
           * Handles a packet.
           *
           * @api private
           */

          Socket.prototype.onPacket = function (packet) {
            if ('opening' == this.readyState || 'open' == this.readyState) {
              debug('socket receive: type "%s", data "%s"', packet.type, packet.data);

              this.emit('packet', packet);

              // Socket is live - any packet counts
              this.emit('heartbeat');

              switch (packet.type) {
                case 'open':
                  this.onHandshake(parsejson(packet.data));
                  break;

                case 'pong':
                  this.setPing();
                  this.emit('pong');
                  break;

                case 'error':
                  var err = new Error('server error');
                  err.code = packet.data;
                  this.onError(err);
                  break;

                case 'message':
                  this.emit('data', packet.data);
                  this.emit('message', packet.data);
                  break;
              }
            } else {
              debug('packet received with socket readyState "%s"', this.readyState);
            }
          };

          /**
           * Called upon handshake completion.
           *
           * @param {Object} handshake obj
           * @api private
           */

          Socket.prototype.onHandshake = function (data) {
            this.emit('handshake', data);
            this.id = data.sid;
            this.transport.query.sid = data.sid;
            this.upgrades = this.filterUpgrades(data.upgrades);
            this.pingInterval = data.pingInterval;
            this.pingTimeout = data.pingTimeout;
            this.onOpen();
            // In case open handler closes socket
            if ('closed' == this.readyState) return;
            this.setPing();

            // Prolong liveness of socket on heartbeat
            this.removeListener('heartbeat', this.onHeartbeat);
            this.on('heartbeat', this.onHeartbeat);
          };

          /**
           * Resets ping timeout.
           *
           * @api private
           */

          Socket.prototype.onHeartbeat = function (timeout) {
            clearTimeout(this.pingTimeoutTimer);
            var self = this;
            self.pingTimeoutTimer = setTimeout(function () {
              if ('closed' == self.readyState) return;
              self.onClose('ping timeout');
            }, timeout || self.pingInterval + self.pingTimeout);
          };

          /**
           * Pings server every `this.pingInterval` and expects response
           * within `this.pingTimeout` or closes connection.
           *
           * @api private
           */

          Socket.prototype.setPing = function () {
            var self = this;
            clearTimeout(self.pingIntervalTimer);
            self.pingIntervalTimer = setTimeout(function () {
              debug('writing ping packet - expecting pong within %sms', self.pingTimeout);
              self.ping();
              self.onHeartbeat(self.pingTimeout);
            }, self.pingInterval);
          };

          /**
          * Sends a ping packet.
          *
          * @api private
          */

          Socket.prototype.ping = function () {
            var self = this;
            this.sendPacket('ping', function () {
              self.emit('ping');
            });
          };

          /**
           * Called on `drain` event
           *
           * @api private
           */

          Socket.prototype.onDrain = function () {
            this.writeBuffer.splice(0, this.prevBufferLen);

            // setting prevBufferLen = 0 is very important
            // for example, when upgrading, upgrade packet is sent over,
            // and a nonzero prevBufferLen could cause problems on `drain`
            this.prevBufferLen = 0;

            if (0 === this.writeBuffer.length) {
              this.emit('drain');
            } else {
              this.flush();
            }
          };

          /**
           * Flush write buffers.
           *
           * @api private
           */

          Socket.prototype.flush = function () {
            if ('closed' != this.readyState && this.transport.writable && !this.upgrading && this.writeBuffer.length) {
              debug('flushing %d packets in socket', this.writeBuffer.length);
              this.transport.send(this.writeBuffer);
              // keep track of current length of writeBuffer
              // splice writeBuffer and callbackBuffer on `drain`
              this.prevBufferLen = this.writeBuffer.length;
              this.emit('flush');
            }
          };

          /**
           * Sends a message.
           *
           * @param {String} message.
           * @param {Function} callback function.
           * @param {Object} options.
           * @return {Socket} for chaining.
           * @api public
           */

          Socket.prototype.write = Socket.prototype.send = function (msg, options, fn) {
            this.sendPacket('message', msg, options, fn);
            return this;
          };

          /**
           * Sends a packet.
           *
           * @param {String} packet type.
           * @param {String} data.
           * @param {Object} options.
           * @param {Function} callback function.
           * @api private
           */

          Socket.prototype.sendPacket = function (type, data, options, fn) {
            if ('function' == typeof data) {
              fn = data;
              data = undefined;
            }

            if ('function' == typeof options) {
              fn = options;
              options = null;
            }

            if ('closing' == this.readyState || 'closed' == this.readyState) {
              return;
            }

            options = options || {};
            options.compress = false !== options.compress;

            var packet = {
              type: type,
              data: data,
              options: options
            };
            this.emit('packetCreate', packet);
            this.writeBuffer.push(packet);
            if (fn) this.once('flush', fn);
            this.flush();
          };

          /**
           * Closes the connection.
           *
           * @api private
           */

          Socket.prototype.close = function () {
            if ('opening' == this.readyState || 'open' == this.readyState) {
              this.readyState = 'closing';

              var self = this;

              if (this.writeBuffer.length) {
                this.once('drain', function () {
                  if (this.upgrading) {
                    waitForUpgrade();
                  } else {
                    close();
                  }
                });
              } else if (this.upgrading) {
                waitForUpgrade();
              } else {
                close();
              }
            }

            function close() {
              self.onClose('forced close');
              debug('socket closing - telling transport to close');
              self.transport.close();
            }

            function cleanupAndClose() {
              self.removeListener('upgrade', cleanupAndClose);
              self.removeListener('upgradeError', cleanupAndClose);
              close();
            }

            function waitForUpgrade() {
              // wait for upgrade to finish since we can't send packets while pausing a transport
              self.once('upgrade', cleanupAndClose);
              self.once('upgradeError', cleanupAndClose);
            }

            return this;
          };

          /**
           * Called upon transport error
           *
           * @api private
           */

          Socket.prototype.onError = function (err) {
            debug('socket error %j', err);
            Socket.priorWebsocketSuccess = false;
            this.emit('error', err);
            this.onClose('transport error', err);
          };

          /**
           * Called upon transport close.
           *
           * @api private
           */

          Socket.prototype.onClose = function (reason, desc) {
            if ('opening' == this.readyState || 'open' == this.readyState || 'closing' == this.readyState) {
              debug('socket close with reason: "%s"', reason);
              var self = this;

              // clear timers
              clearTimeout(this.pingIntervalTimer);
              clearTimeout(this.pingTimeoutTimer);

              // stop event from firing again for transport
              this.transport.removeAllListeners('close');

              // ensure transport won't stay open
              this.transport.close();

              // ignore further transport communication
              this.transport.removeAllListeners();

              // set ready state
              this.readyState = 'closed';

              // clear session id
              this.id = null;

              // emit close event
              this.emit('close', reason, desc);

              // clean buffers after, so users can still
              // grab the buffers on `close` event
              self.writeBuffer = [];
              self.prevBufferLen = 0;
            }
          };

          /**
           * Filters upgrades, returning only those matching client transports.
           *
           * @param {Array} server upgrades
           * @api private
           *
           */

          Socket.prototype.filterUpgrades = function (upgrades) {
            var filteredUpgrades = [];
            for (var i = 0, j = upgrades.length; i < j; i++) {
              if (~index(this.transports, upgrades[i])) filteredUpgrades.push(upgrades[i]);
            }
            return filteredUpgrades;
          };
        }).call(this, typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {});
      }, { "./transport": 19, "./transports": 20, "component-emitter": 26, "debug": 14, "engine.io-parser": 27, "indexof": 33, "parsejson": 37, "parseqs": 38, "parseuri": 39 }], 19: [function (_dereq_, module, exports) {
        /**
         * Module dependencies.
         */

        var parser = _dereq_('engine.io-parser');
        var Emitter = _dereq_('component-emitter');

        /**
         * Module exports.
         */

        module.exports = Transport;

        /**
         * Transport abstract constructor.
         *
         * @param {Object} options.
         * @api private
         */

        function Transport(opts) {
          this.path = opts.path;
          this.hostname = opts.hostname;
          this.port = opts.port;
          this.secure = opts.secure;
          this.query = opts.query;
          this.timestampParam = opts.timestampParam;
          this.timestampRequests = opts.timestampRequests;
          this.readyState = '';
          this.agent = opts.agent || false;
          this.socket = opts.socket;
          this.enablesXDR = opts.enablesXDR;

          // SSL options for Node.js client
          this.pfx = opts.pfx;
          this.key = opts.key;
          this.passphrase = opts.passphrase;
          this.cert = opts.cert;
          this.ca = opts.ca;
          this.ciphers = opts.ciphers;
          this.rejectUnauthorized = opts.rejectUnauthorized;

          // other options for Node.js client
          this.extraHeaders = opts.extraHeaders;
        }

        /**
         * Mix in `Emitter`.
         */

        Emitter(Transport.prototype);

        /**
         * Emits an error.
         *
         * @param {String} str
         * @return {Transport} for chaining
         * @api public
         */

        Transport.prototype.onError = function (msg, desc) {
          var err = new Error(msg);
          err.type = 'TransportError';
          err.description = desc;
          this.emit('error', err);
          return this;
        };

        /**
         * Opens the transport.
         *
         * @api public
         */

        Transport.prototype.open = function () {
          if ('closed' == this.readyState || '' == this.readyState) {
            this.readyState = 'opening';
            this.doOpen();
          }

          return this;
        };

        /**
         * Closes the transport.
         *
         * @api private
         */

        Transport.prototype.close = function () {
          if ('opening' == this.readyState || 'open' == this.readyState) {
            this.doClose();
            this.onClose();
          }

          return this;
        };

        /**
         * Sends multiple packets.
         *
         * @param {Array} packets
         * @api private
         */

        Transport.prototype.send = function (packets) {
          if ('open' == this.readyState) {
            this.write(packets);
          } else {
            throw new Error('Transport not open');
          }
        };

        /**
         * Called upon open
         *
         * @api private
         */

        Transport.prototype.onOpen = function () {
          this.readyState = 'open';
          this.writable = true;
          this.emit('open');
        };

        /**
         * Called with data.
         *
         * @param {String} data
         * @api private
         */

        Transport.prototype.onData = function (data) {
          var packet = parser.decodePacket(data, this.socket.binaryType);
          this.onPacket(packet);
        };

        /**
         * Called with a decoded packet.
         */

        Transport.prototype.onPacket = function (packet) {
          this.emit('packet', packet);
        };

        /**
         * Called upon close.
         *
         * @api private
         */

        Transport.prototype.onClose = function () {
          this.readyState = 'closed';
          this.emit('close');
        };
      }, { "component-emitter": 26, "engine.io-parser": 27 }], 20: [function (_dereq_, module, exports) {
        (function (global) {
          /**
           * Module dependencies
           */

          var XMLHttpRequest = _dereq_('xmlhttprequest-ssl');
          var XHR = _dereq_('./polling-xhr');
          var JSONP = _dereq_('./polling-jsonp');
          var websocket = _dereq_('./websocket');

          /**
           * Export transports.
           */

          exports.polling = polling;
          exports.websocket = websocket;

          /**
           * Polling transport polymorphic constructor.
           * Decides on xhr vs jsonp based on feature detection.
           *
           * @api private
           */

          function polling(opts) {
            var xhr;
            var xd = false;
            var xs = false;
            var jsonp = false !== opts.jsonp;

            if (global.location) {
              var isSSL = 'https:' == location.protocol;
              var port = location.port;

              // some user agents have empty `location.port`
              if (!port) {
                port = isSSL ? 443 : 80;
              }

              xd = opts.hostname != location.hostname || port != opts.port;
              xs = opts.secure != isSSL;
            }

            opts.xdomain = xd;
            opts.xscheme = xs;
            xhr = new XMLHttpRequest(opts);

            if ('open' in xhr && !opts.forceJSONP) {
              return new XHR(opts);
            } else {
              if (!jsonp) throw new Error('JSONP disabled');
              return new JSONP(opts);
            }
          }
        }).call(this, typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {});
      }, { "./polling-jsonp": 21, "./polling-xhr": 22, "./websocket": 24, "xmlhttprequest-ssl": 25 }], 21: [function (_dereq_, module, exports) {
        (function (global) {

          /**
           * Module requirements.
           */

          var Polling = _dereq_('./polling');
          var inherit = _dereq_('component-inherit');

          /**
           * Module exports.
           */

          module.exports = JSONPPolling;

          /**
           * Cached regular expressions.
           */

          var rNewline = /\n/g;
          var rEscapedNewline = /\\n/g;

          /**
           * Global JSONP callbacks.
           */

          var callbacks;

          /**
           * Callbacks count.
           */

          var index = 0;

          /**
           * Noop.
           */

          function empty() {}

          /**
           * JSONP Polling constructor.
           *
           * @param {Object} opts.
           * @api public
           */

          function JSONPPolling(opts) {
            Polling.call(this, opts);

            this.query = this.query || {};

            // define global callbacks array if not present
            // we do this here (lazily) to avoid unneeded global pollution
            if (!callbacks) {
              // we need to consider multiple engines in the same page
              if (!global.___eio) global.___eio = [];
              callbacks = global.___eio;
            }

            // callback identifier
            this.index = callbacks.length;

            // add callback to jsonp global
            var self = this;
            callbacks.push(function (msg) {
              self.onData(msg);
            });

            // append to query string
            this.query.j = this.index;

            // prevent spurious errors from being emitted when the window is unloaded
            if (global.document && global.addEventListener) {
              global.addEventListener('beforeunload', function () {
                if (self.script) self.script.onerror = empty;
              }, false);
            }
          }

          /**
           * Inherits from Polling.
           */

          inherit(JSONPPolling, Polling);

          /*
           * JSONP only supports binary as base64 encoded strings
           */

          JSONPPolling.prototype.supportsBinary = false;

          /**
           * Closes the socket.
           *
           * @api private
           */

          JSONPPolling.prototype.doClose = function () {
            if (this.script) {
              this.script.parentNode.removeChild(this.script);
              this.script = null;
            }

            if (this.form) {
              this.form.parentNode.removeChild(this.form);
              this.form = null;
              this.iframe = null;
            }

            Polling.prototype.doClose.call(this);
          };

          /**
           * Starts a poll cycle.
           *
           * @api private
           */

          JSONPPolling.prototype.doPoll = function () {
            var self = this;
            var script = document.createElement('script');

            if (this.script) {
              this.script.parentNode.removeChild(this.script);
              this.script = null;
            }

            script.async = true;
            script.src = this.uri();
            script.onerror = function (e) {
              self.onError('jsonp poll error', e);
            };

            var insertAt = document.getElementsByTagName('script')[0];
            insertAt.parentNode.insertBefore(script, insertAt);
            this.script = script;

            var isUAgecko = 'undefined' != typeof navigator && /gecko/i.test(navigator.userAgent);

            if (isUAgecko) {
              setTimeout(function () {
                var iframe = document.createElement('iframe');
                document.body.appendChild(iframe);
                document.body.removeChild(iframe);
              }, 100);
            }
          };

          /**
           * Writes with a hidden iframe.
           *
           * @param {String} data to send
           * @param {Function} called upon flush.
           * @api private
           */

          JSONPPolling.prototype.doWrite = function (data, fn) {
            var self = this;

            if (!this.form) {
              var form = document.createElement('form');
              var area = document.createElement('textarea');
              var id = this.iframeId = 'eio_iframe_' + this.index;
              var iframe;

              form.className = 'socketio';
              form.style.position = 'absolute';
              form.style.top = '-1000px';
              form.style.left = '-1000px';
              form.target = id;
              form.method = 'POST';
              form.setAttribute('accept-charset', 'utf-8');
              area.name = 'd';
              form.appendChild(area);
              document.body.appendChild(form);

              this.form = form;
              this.area = area;
            }

            this.form.action = this.uri();

            function complete() {
              initIframe();
              fn();
            }

            function initIframe() {
              if (self.iframe) {
                try {
                  self.form.removeChild(self.iframe);
                } catch (e) {
                  self.onError('jsonp polling iframe removal error', e);
                }
              }

              try {
                // ie6 dynamic iframes with target="" support (thanks Chris Lambacher)
                var html = '<iframe src="javascript:0" name="' + self.iframeId + '">';
                iframe = document.createElement(html);
              } catch (e) {
                iframe = document.createElement('iframe');
                iframe.name = self.iframeId;
                iframe.src = 'javascript:0';
              }

              iframe.id = self.iframeId;

              self.form.appendChild(iframe);
              self.iframe = iframe;
            }

            initIframe();

            // escape \n to prevent it from being converted into \r\n by some UAs
            // double escaping is required for escaped new lines because unescaping of new lines can be done safely on server-side
            data = data.replace(rEscapedNewline, '\\\n');
            this.area.value = data.replace(rNewline, '\\n');

            try {
              this.form.submit();
            } catch (e) {}

            if (this.iframe.attachEvent) {
              this.iframe.onreadystatechange = function () {
                if (self.iframe.readyState == 'complete') {
                  complete();
                }
              };
            } else {
              this.iframe.onload = complete;
            }
          };
        }).call(this, typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {});
      }, { "./polling": 23, "component-inherit": 13 }], 22: [function (_dereq_, module, exports) {
        (function (global) {
          /**
           * Module requirements.
           */

          var XMLHttpRequest = _dereq_('xmlhttprequest-ssl');
          var Polling = _dereq_('./polling');
          var Emitter = _dereq_('component-emitter');
          var inherit = _dereq_('component-inherit');
          var debug = _dereq_('debug')('engine.io-client:polling-xhr');

          /**
           * Module exports.
           */

          module.exports = XHR;
          module.exports.Request = Request;

          /**
           * Empty function
           */

          function empty() {}

          /**
           * XHR Polling constructor.
           *
           * @param {Object} opts
           * @api public
           */

          function XHR(opts) {
            Polling.call(this, opts);

            if (global.location) {
              var isSSL = 'https:' == location.protocol;
              var port = location.port;

              // some user agents have empty `location.port`
              if (!port) {
                port = isSSL ? 443 : 80;
              }

              this.xd = opts.hostname != global.location.hostname || port != opts.port;
              this.xs = opts.secure != isSSL;
            } else {
              this.extraHeaders = opts.extraHeaders;
            }
          }

          /**
           * Inherits from Polling.
           */

          inherit(XHR, Polling);

          /**
           * XHR supports binary
           */

          XHR.prototype.supportsBinary = true;

          /**
           * Creates a request.
           *
           * @param {String} method
           * @api private
           */

          XHR.prototype.request = function (opts) {
            opts = opts || {};
            opts.uri = this.uri();
            opts.xd = this.xd;
            opts.xs = this.xs;
            opts.agent = this.agent || false;
            opts.supportsBinary = this.supportsBinary;
            opts.enablesXDR = this.enablesXDR;

            // SSL options for Node.js client
            opts.pfx = this.pfx;
            opts.key = this.key;
            opts.passphrase = this.passphrase;
            opts.cert = this.cert;
            opts.ca = this.ca;
            opts.ciphers = this.ciphers;
            opts.rejectUnauthorized = this.rejectUnauthorized;

            // other options for Node.js client
            opts.extraHeaders = this.extraHeaders;

            return new Request(opts);
          };

          /**
           * Sends data.
           *
           * @param {String} data to send.
           * @param {Function} called upon flush.
           * @api private
           */

          XHR.prototype.doWrite = function (data, fn) {
            var isBinary = typeof data !== 'string' && data !== undefined;
            var req = this.request({ method: 'POST', data: data, isBinary: isBinary });
            var self = this;
            req.on('success', fn);
            req.on('error', function (err) {
              self.onError('xhr post error', err);
            });
            this.sendXhr = req;
          };

          /**
           * Starts a poll cycle.
           *
           * @api private
           */

          XHR.prototype.doPoll = function () {
            debug('xhr poll');
            var req = this.request();
            var self = this;
            req.on('data', function (data) {
              self.onData(data);
            });
            req.on('error', function (err) {
              self.onError('xhr poll error', err);
            });
            this.pollXhr = req;
          };

          /**
           * Request constructor
           *
           * @param {Object} options
           * @api public
           */

          function Request(opts) {
            this.method = opts.method || 'GET';
            this.uri = opts.uri;
            this.xd = !!opts.xd;
            this.xs = !!opts.xs;
            this.async = false !== opts.async;
            this.data = undefined != opts.data ? opts.data : null;
            this.agent = opts.agent;
            this.isBinary = opts.isBinary;
            this.supportsBinary = opts.supportsBinary;
            this.enablesXDR = opts.enablesXDR;

            // SSL options for Node.js client
            this.pfx = opts.pfx;
            this.key = opts.key;
            this.passphrase = opts.passphrase;
            this.cert = opts.cert;
            this.ca = opts.ca;
            this.ciphers = opts.ciphers;
            this.rejectUnauthorized = opts.rejectUnauthorized;

            // other options for Node.js client
            this.extraHeaders = opts.extraHeaders;

            this.create();
          }

          /**
           * Mix in `Emitter`.
           */

          Emitter(Request.prototype);

          /**
           * Creates the XHR object and sends the request.
           *
           * @api private
           */

          Request.prototype.create = function () {
            var opts = { agent: this.agent, xdomain: this.xd, xscheme: this.xs, enablesXDR: this.enablesXDR };

            // SSL options for Node.js client
            opts.pfx = this.pfx;
            opts.key = this.key;
            opts.passphrase = this.passphrase;
            opts.cert = this.cert;
            opts.ca = this.ca;
            opts.ciphers = this.ciphers;
            opts.rejectUnauthorized = this.rejectUnauthorized;

            var xhr = this.xhr = new XMLHttpRequest(opts);
            var self = this;

            try {
              debug('xhr open %s: %s', this.method, this.uri);
              xhr.open(this.method, this.uri, this.async);
              try {
                if (this.extraHeaders) {
                  xhr.setDisableHeaderCheck(true);
                  for (var i in this.extraHeaders) {
                    if (this.extraHeaders.hasOwnProperty(i)) {
                      xhr.setRequestHeader(i, this.extraHeaders[i]);
                    }
                  }
                }
              } catch (e) {}
              if (this.supportsBinary) {
                // This has to be done after open because Firefox is stupid
                // http://stackoverflow.com/questions/13216903/get-binary-data-with-xmlhttprequest-in-a-firefox-extension
                xhr.responseType = 'arraybuffer';
              }

              if ('POST' == this.method) {
                try {
                  if (this.isBinary) {
                    xhr.setRequestHeader('Content-type', 'application/octet-stream');
                  } else {
                    xhr.setRequestHeader('Content-type', 'text/plain;charset=UTF-8');
                  }
                } catch (e) {}
              }

              // ie6 check
              if ('withCredentials' in xhr) {
                xhr.withCredentials = true;
              }

              if (this.hasXDR()) {
                xhr.onload = function () {
                  self.onLoad();
                };
                xhr.onerror = function () {
                  self.onError(xhr.responseText);
                };
              } else {
                xhr.onreadystatechange = function () {
                  if (4 != xhr.readyState) return;
                  if (200 == xhr.status || 1223 == xhr.status) {
                    self.onLoad();
                  } else {
                    // make sure the `error` event handler that's user-set
                    // does not throw in the same tick and gets caught here
                    setTimeout(function () {
                      self.onError(xhr.status);
                    }, 0);
                  }
                };
              }

              debug('xhr data %s', this.data);
              xhr.send(this.data);
            } catch (e) {
              // Need to defer since .create() is called directly fhrom the constructor
              // and thus the 'error' event can only be only bound *after* this exception
              // occurs.  Therefore, also, we cannot throw here at all.
              setTimeout(function () {
                self.onError(e);
              }, 0);
              return;
            }

            if (global.document) {
              this.index = Request.requestsCount++;
              Request.requests[this.index] = this;
            }
          };

          /**
           * Called upon successful response.
           *
           * @api private
           */

          Request.prototype.onSuccess = function () {
            this.emit('success');
            this.cleanup();
          };

          /**
           * Called if we have data.
           *
           * @api private
           */

          Request.prototype.onData = function (data) {
            this.emit('data', data);
            this.onSuccess();
          };

          /**
           * Called upon error.
           *
           * @api private
           */

          Request.prototype.onError = function (err) {
            this.emit('error', err);
            this.cleanup(true);
          };

          /**
           * Cleans up house.
           *
           * @api private
           */

          Request.prototype.cleanup = function (fromError) {
            if ('undefined' == typeof this.xhr || null === this.xhr) {
              return;
            }
            // xmlhttprequest
            if (this.hasXDR()) {
              this.xhr.onload = this.xhr.onerror = empty;
            } else {
              this.xhr.onreadystatechange = empty;
            }

            if (fromError) {
              try {
                this.xhr.abort();
              } catch (e) {}
            }

            if (global.document) {
              delete Request.requests[this.index];
            }

            this.xhr = null;
          };

          /**
           * Called upon load.
           *
           * @api private
           */

          Request.prototype.onLoad = function () {
            var data;
            try {
              var contentType;
              try {
                contentType = this.xhr.getResponseHeader('Content-Type').split(';')[0];
              } catch (e) {}
              if (contentType === 'application/octet-stream') {
                data = this.xhr.response;
              } else {
                if (!this.supportsBinary) {
                  data = this.xhr.responseText;
                } else {
                  try {
                    data = String.fromCharCode.apply(null, new Uint8Array(this.xhr.response));
                  } catch (e) {
                    var ui8Arr = new Uint8Array(this.xhr.response);
                    var dataArray = [];
                    for (var idx = 0, length = ui8Arr.length; idx < length; idx++) {
                      dataArray.push(ui8Arr[idx]);
                    }

                    data = String.fromCharCode.apply(null, dataArray);
                  }
                }
              }
            } catch (e) {
              this.onError(e);
            }
            if (null != data) {
              this.onData(data);
            }
          };

          /**
           * Check if it has XDomainRequest.
           *
           * @api private
           */

          Request.prototype.hasXDR = function () {
            return 'undefined' !== typeof global.XDomainRequest && !this.xs && this.enablesXDR;
          };

          /**
           * Aborts the request.
           *
           * @api public
           */

          Request.prototype.abort = function () {
            this.cleanup();
          };

          /**
           * Aborts pending requests when unloading the window. This is needed to prevent
           * memory leaks (e.g. when using IE) and to ensure that no spurious error is
           * emitted.
           */

          if (global.document) {
            Request.requestsCount = 0;
            Request.requests = {};
            if (global.attachEvent) {
              global.attachEvent('onunload', unloadHandler);
            } else if (global.addEventListener) {
              global.addEventListener('beforeunload', unloadHandler, false);
            }
          }

          function unloadHandler() {
            for (var i in Request.requests) {
              if (Request.requests.hasOwnProperty(i)) {
                Request.requests[i].abort();
              }
            }
          }
        }).call(this, typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {});
      }, { "./polling": 23, "component-emitter": 26, "component-inherit": 13, "debug": 14, "xmlhttprequest-ssl": 25 }], 23: [function (_dereq_, module, exports) {
        /**
         * Module dependencies.
         */

        var Transport = _dereq_('../transport');
        var parseqs = _dereq_('parseqs');
        var parser = _dereq_('engine.io-parser');
        var inherit = _dereq_('component-inherit');
        var yeast = _dereq_('yeast');
        var debug = _dereq_('debug')('engine.io-client:polling');

        /**
         * Module exports.
         */

        module.exports = Polling;

        /**
         * Is XHR2 supported?
         */

        var hasXHR2 = function () {
          var XMLHttpRequest = _dereq_('xmlhttprequest-ssl');
          var xhr = new XMLHttpRequest({ xdomain: false });
          return null != xhr.responseType;
        }();

        /**
         * Polling interface.
         *
         * @param {Object} opts
         * @api private
         */

        function Polling(opts) {
          var forceBase64 = opts && opts.forceBase64;
          if (!hasXHR2 || forceBase64) {
            this.supportsBinary = false;
          }
          Transport.call(this, opts);
        }

        /**
         * Inherits from Transport.
         */

        inherit(Polling, Transport);

        /**
         * Transport name.
         */

        Polling.prototype.name = 'polling';

        /**
         * Opens the socket (triggers polling). We write a PING message to determine
         * when the transport is open.
         *
         * @api private
         */

        Polling.prototype.doOpen = function () {
          this.poll();
        };

        /**
         * Pauses polling.
         *
         * @param {Function} callback upon buffers are flushed and transport is paused
         * @api private
         */

        Polling.prototype.pause = function (onPause) {
          var pending = 0;
          var self = this;

          this.readyState = 'pausing';

          function pause() {
            debug('paused');
            self.readyState = 'paused';
            onPause();
          }

          if (this.polling || !this.writable) {
            var total = 0;

            if (this.polling) {
              debug('we are currently polling - waiting to pause');
              total++;
              this.once('pollComplete', function () {
                debug('pre-pause polling complete');
                --total || pause();
              });
            }

            if (!this.writable) {
              debug('we are currently writing - waiting to pause');
              total++;
              this.once('drain', function () {
                debug('pre-pause writing complete');
                --total || pause();
              });
            }
          } else {
            pause();
          }
        };

        /**
         * Starts polling cycle.
         *
         * @api public
         */

        Polling.prototype.poll = function () {
          debug('polling');
          this.polling = true;
          this.doPoll();
          this.emit('poll');
        };

        /**
         * Overloads onData to detect payloads.
         *
         * @api private
         */

        Polling.prototype.onData = function (data) {
          var self = this;
          debug('polling got data %s', data);
          var callback = function callback(packet, index, total) {
            // if its the first message we consider the transport open
            if ('opening' == self.readyState) {
              self.onOpen();
            }

            // if its a close packet, we close the ongoing requests
            if ('close' == packet.type) {
              self.onClose();
              return false;
            }

            // otherwise bypass onData and handle the message
            self.onPacket(packet);
          };

          // decode payload
          parser.decodePayload(data, this.socket.binaryType, callback);

          // if an event did not trigger closing
          if ('closed' != this.readyState) {
            // if we got data we're not polling
            this.polling = false;
            this.emit('pollComplete');

            if ('open' == this.readyState) {
              this.poll();
            } else {
              debug('ignoring poll - transport state "%s"', this.readyState);
            }
          }
        };

        /**
         * For polling, send a close packet.
         *
         * @api private
         */

        Polling.prototype.doClose = function () {
          var self = this;

          function close() {
            debug('writing close packet');
            self.write([{ type: 'close' }]);
          }

          if ('open' == this.readyState) {
            debug('transport open - closing');
            close();
          } else {
            // in case we're trying to close while
            // handshaking is in progress (GH-164)
            debug('transport not open - deferring close');
            this.once('open', close);
          }
        };

        /**
         * Writes a packets payload.
         *
         * @param {Array} data packets
         * @param {Function} drain callback
         * @api private
         */

        Polling.prototype.write = function (packets) {
          var self = this;
          this.writable = false;
          var callbackfn = function callbackfn() {
            self.writable = true;
            self.emit('drain');
          };

          var self = this;
          parser.encodePayload(packets, this.supportsBinary, function (data) {
            self.doWrite(data, callbackfn);
          });
        };

        /**
         * Generates uri for connection.
         *
         * @api private
         */

        Polling.prototype.uri = function () {
          var query = this.query || {};
          var schema = this.secure ? 'https' : 'http';
          var port = '';

          // cache busting is forced
          if (false !== this.timestampRequests) {
            query[this.timestampParam] = yeast();
          }

          if (!this.supportsBinary && !query.sid) {
            query.b64 = 1;
          }

          query = parseqs.encode(query);

          // avoid port if default for schema
          if (this.port && ('https' == schema && this.port != 443 || 'http' == schema && this.port != 80)) {
            port = ':' + this.port;
          }

          // prepend ? to query
          if (query.length) {
            query = '?' + query;
          }

          var ipv6 = this.hostname.indexOf(':') !== -1;
          return schema + '://' + (ipv6 ? '[' + this.hostname + ']' : this.hostname) + port + this.path + query;
        };
      }, { "../transport": 19, "component-inherit": 13, "debug": 14, "engine.io-parser": 27, "parseqs": 38, "xmlhttprequest-ssl": 25, "yeast": 47 }], 24: [function (_dereq_, module, exports) {
        (function (global) {
          /**
           * Module dependencies.
           */

          var Transport = _dereq_('../transport');
          var parser = _dereq_('engine.io-parser');
          var parseqs = _dereq_('parseqs');
          var inherit = _dereq_('component-inherit');
          var yeast = _dereq_('yeast');
          var debug = _dereq_('debug')('engine.io-client:websocket');

          /**
           * `ws` exposes a WebSocket-compatible interface in
           * Node, or the `WebSocket` or `MozWebSocket` globals
           * in the browser.
           */

          var WebSocket = _dereq_('ws');

          /**
           * Module exports.
           */

          module.exports = WS;

          /**
           * WebSocket transport constructor.
           *
           * @api {Object} connection options
           * @api public
           */

          function WS(opts) {
            var forceBase64 = opts && opts.forceBase64;
            if (forceBase64) {
              this.supportsBinary = false;
            }
            this.perMessageDeflate = opts.perMessageDeflate;
            Transport.call(this, opts);
          }

          /**
           * Inherits from Transport.
           */

          inherit(WS, Transport);

          /**
           * Transport name.
           *
           * @api public
           */

          WS.prototype.name = 'websocket';

          /*
           * WebSockets support binary
           */

          WS.prototype.supportsBinary = true;

          /**
           * Opens socket.
           *
           * @api private
           */

          WS.prototype.doOpen = function () {
            if (!this.check()) {
              // let probe timeout
              return;
            }

            var self = this;
            var uri = this.uri();
            var protocols = void 0;
            var opts = {
              agent: this.agent,
              perMessageDeflate: this.perMessageDeflate
            };

            // SSL options for Node.js client
            opts.pfx = this.pfx;
            opts.key = this.key;
            opts.passphrase = this.passphrase;
            opts.cert = this.cert;
            opts.ca = this.ca;
            opts.ciphers = this.ciphers;
            opts.rejectUnauthorized = this.rejectUnauthorized;
            if (this.extraHeaders) {
              opts.headers = this.extraHeaders;
            }

            this.ws = new WebSocket(uri, protocols, opts);

            if (this.ws.binaryType === undefined) {
              this.supportsBinary = false;
            }

            if (this.ws.supports && this.ws.supports.binary) {
              this.supportsBinary = true;
              this.ws.binaryType = 'buffer';
            } else {
              this.ws.binaryType = 'arraybuffer';
            }

            this.addEventListeners();
          };

          /**
           * Adds event listeners to the socket
           *
           * @api private
           */

          WS.prototype.addEventListeners = function () {
            var self = this;

            this.ws.onopen = function () {
              self.onOpen();
            };
            this.ws.onclose = function () {
              self.onClose();
            };
            this.ws.onmessage = function (ev) {
              self.onData(ev.data);
            };
            this.ws.onerror = function (e) {
              self.onError('websocket error', e);
            };
          };

          /**
           * Override `onData` to use a timer on iOS.
           * See: https://gist.github.com/mloughran/2052006
           *
           * @api private
           */

          if ('undefined' != typeof navigator && /iPad|iPhone|iPod/i.test(navigator.userAgent)) {
            WS.prototype.onData = function (data) {
              var self = this;
              setTimeout(function () {
                Transport.prototype.onData.call(self, data);
              }, 0);
            };
          }

          /**
           * Writes data to socket.
           *
           * @param {Array} array of packets.
           * @api private
           */

          WS.prototype.write = function (packets) {
            var self = this;
            this.writable = false;

            var isBrowserWebSocket = global.WebSocket && this.ws instanceof global.WebSocket;

            // encodePacket efficient as it uses WS framing
            // no need for encodePayload
            var total = packets.length;
            for (var i = 0, l = total; i < l; i++) {
              (function (packet) {
                parser.encodePacket(packet, self.supportsBinary, function (data) {
                  if (!isBrowserWebSocket) {
                    // always create a new object (GH-437)
                    var opts = {};
                    if (packet.options) {
                      opts.compress = packet.options.compress;
                    }

                    if (self.perMessageDeflate) {
                      var len = 'string' == typeof data ? global.Buffer.byteLength(data) : data.length;
                      if (len < self.perMessageDeflate.threshold) {
                        opts.compress = false;
                      }
                    }
                  }

                  //Sometimes the websocket has already been closed but the browser didn't
                  //have a chance of informing us about it yet, in that case send will
                  //throw an error
                  try {
                    if (isBrowserWebSocket) {
                      // TypeError is thrown when passing the second argument on Safari
                      self.ws.send(data);
                    } else {
                      self.ws.send(data, opts);
                    }
                  } catch (e) {
                    debug('websocket closed before onclose event');
                  }

                  --total || done();
                });
              })(packets[i]);
            }

            function done() {
              self.emit('flush');

              // fake drain
              // defer to next tick to allow Socket to clear writeBuffer
              setTimeout(function () {
                self.writable = true;
                self.emit('drain');
              }, 0);
            }
          };

          /**
           * Called upon close
           *
           * @api private
           */

          WS.prototype.onClose = function () {
            Transport.prototype.onClose.call(this);
          };

          /**
           * Closes socket.
           *
           * @api private
           */

          WS.prototype.doClose = function () {
            if (typeof this.ws !== 'undefined') {
              this.ws.close();
            }
          };

          /**
           * Generates uri for connection.
           *
           * @api private
           */

          WS.prototype.uri = function () {
            var query = this.query || {};
            var schema = this.secure ? 'wss' : 'ws';
            var port = '';

            // avoid port if default for schema
            if (this.port && ('wss' == schema && this.port != 443 || 'ws' == schema && this.port != 80)) {
              port = ':' + this.port;
            }

            // append timestamp to URI
            if (this.timestampRequests) {
              query[this.timestampParam] = yeast();
            }

            // communicate binary support capabilities
            if (!this.supportsBinary) {
              query.b64 = 1;
            }

            query = parseqs.encode(query);

            // prepend ? to query
            if (query.length) {
              query = '?' + query;
            }

            var ipv6 = this.hostname.indexOf(':') !== -1;
            return schema + '://' + (ipv6 ? '[' + this.hostname + ']' : this.hostname) + port + this.path + query;
          };

          /**
           * Feature detection for WebSocket.
           *
           * @return {Boolean} whether this transport is available.
           * @api public
           */

          WS.prototype.check = function () {
            return !!WebSocket && !('__initialize' in WebSocket && this.name === WS.prototype.name);
          };
        }).call(this, typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {});
      }, { "../transport": 19, "component-inherit": 13, "debug": 14, "engine.io-parser": 27, "parseqs": 38, "ws": 46, "yeast": 47 }], 25: [function (_dereq_, module, exports) {
        // browser shim for xmlhttprequest module
        var hasCORS = _dereq_('has-cors');

        module.exports = function (opts) {
          var xdomain = opts.xdomain;

          // scheme must be same when usign XDomainRequest
          // http://blogs.msdn.com/b/ieinternals/archive/2010/05/13/xdomainrequest-restrictions-limitations-and-workarounds.aspx
          var xscheme = opts.xscheme;

          // XDomainRequest has a flow of not sending cookie, therefore it should be disabled as a default.
          // https://github.com/Automattic/engine.io-client/pull/217
          var enablesXDR = opts.enablesXDR;

          // XMLHttpRequest can be disabled on IE
          try {
            if ('undefined' != typeof XMLHttpRequest && (!xdomain || hasCORS)) {
              return new XMLHttpRequest();
            }
          } catch (e) {}

          // Use XDomainRequest for IE8 if enablesXDR is true
          // because loading bar keeps flashing when using jsonp-polling
          // https://github.com/yujiosaka/socke.io-ie8-loading-example
          try {
            if ('undefined' != typeof XDomainRequest && !xscheme && enablesXDR) {
              return new XDomainRequest();
            }
          } catch (e) {}

          if (!xdomain) {
            try {
              return new ActiveXObject('Microsoft.XMLHTTP');
            } catch (e) {}
          }
        };
      }, { "has-cors": 32 }], 26: [function (_dereq_, module, exports) {

        /**
         * Expose `Emitter`.
         */

        module.exports = Emitter;

        /**
         * Initialize a new `Emitter`.
         *
         * @api public
         */

        function Emitter(obj) {
          if (obj) return mixin(obj);
        };

        /**
         * Mixin the emitter properties.
         *
         * @param {Object} obj
         * @return {Object}
         * @api private
         */

        function mixin(obj) {
          for (var key in Emitter.prototype) {
            obj[key] = Emitter.prototype[key];
          }
          return obj;
        }

        /**
         * Listen on the given `event` with `fn`.
         *
         * @param {String} event
         * @param {Function} fn
         * @return {Emitter}
         * @api public
         */

        Emitter.prototype.on = Emitter.prototype.addEventListener = function (event, fn) {
          this._callbacks = this._callbacks || {};
          (this._callbacks[event] = this._callbacks[event] || []).push(fn);
          return this;
        };

        /**
         * Adds an `event` listener that will be invoked a single
         * time then automatically removed.
         *
         * @param {String} event
         * @param {Function} fn
         * @return {Emitter}
         * @api public
         */

        Emitter.prototype.once = function (event, fn) {
          var self = this;
          this._callbacks = this._callbacks || {};

          function on() {
            self.off(event, on);
            fn.apply(this, arguments);
          }

          on.fn = fn;
          this.on(event, on);
          return this;
        };

        /**
         * Remove the given callback for `event` or all
         * registered callbacks.
         *
         * @param {String} event
         * @param {Function} fn
         * @return {Emitter}
         * @api public
         */

        Emitter.prototype.off = Emitter.prototype.removeListener = Emitter.prototype.removeAllListeners = Emitter.prototype.removeEventListener = function (event, fn) {
          this._callbacks = this._callbacks || {};

          // all
          if (0 == arguments.length) {
            this._callbacks = {};
            return this;
          }

          // specific event
          var callbacks = this._callbacks[event];
          if (!callbacks) return this;

          // remove all handlers
          if (1 == arguments.length) {
            delete this._callbacks[event];
            return this;
          }

          // remove specific handler
          var cb;
          for (var i = 0; i < callbacks.length; i++) {
            cb = callbacks[i];
            if (cb === fn || cb.fn === fn) {
              callbacks.splice(i, 1);
              break;
            }
          }
          return this;
        };

        /**
         * Emit `event` with the given args.
         *
         * @param {String} event
         * @param {Mixed} ...
         * @return {Emitter}
         */

        Emitter.prototype.emit = function (event) {
          this._callbacks = this._callbacks || {};
          var args = [].slice.call(arguments, 1),
              callbacks = this._callbacks[event];

          if (callbacks) {
            callbacks = callbacks.slice(0);
            for (var i = 0, len = callbacks.length; i < len; ++i) {
              callbacks[i].apply(this, args);
            }
          }

          return this;
        };

        /**
         * Return array of callbacks for `event`.
         *
         * @param {String} event
         * @return {Array}
         * @api public
         */

        Emitter.prototype.listeners = function (event) {
          this._callbacks = this._callbacks || {};
          return this._callbacks[event] || [];
        };

        /**
         * Check if this emitter has `event` handlers.
         *
         * @param {String} event
         * @return {Boolean}
         * @api public
         */

        Emitter.prototype.hasListeners = function (event) {
          return !!this.listeners(event).length;
        };
      }, {}], 27: [function (_dereq_, module, exports) {
        (function (global) {
          /**
           * Module dependencies.
           */

          var keys = _dereq_('./keys');
          var hasBinary = _dereq_('has-binary');
          var sliceBuffer = _dereq_('arraybuffer.slice');
          var base64encoder = _dereq_('base64-arraybuffer');
          var after = _dereq_('after');
          var utf8 = _dereq_('utf8');

          /**
           * Check if we are running an android browser. That requires us to use
           * ArrayBuffer with polling transports...
           *
           * http://ghinda.net/jpeg-blob-ajax-android/
           */

          var isAndroid = navigator.userAgent.match(/Android/i);

          /**
           * Check if we are running in PhantomJS.
           * Uploading a Blob with PhantomJS does not work correctly, as reported here:
           * https://github.com/ariya/phantomjs/issues/11395
           * @type boolean
           */
          var isPhantomJS = /PhantomJS/i.test(navigator.userAgent);

          /**
           * When true, avoids using Blobs to encode payloads.
           * @type boolean
           */
          var dontSendBlobs = isAndroid || isPhantomJS;

          /**
           * Current protocol version.
           */

          exports.protocol = 3;

          /**
           * Packet types.
           */

          var packets = exports.packets = {
            open: 0 // non-ws
            , close: 1 // non-ws
            , ping: 2,
            pong: 3,
            message: 4,
            upgrade: 5,
            noop: 6
          };

          var packetslist = keys(packets);

          /**
           * Premade error packet.
           */

          var err = { type: 'error', data: 'parser error' };

          /**
           * Create a blob api even for blob builder when vendor prefixes exist
           */

          var Blob = _dereq_('blob');

          /**
           * Encodes a packet.
           *
           *     <packet type id> [ <data> ]
           *
           * Example:
           *
           *     5hello world
           *     3
           *     4
           *
           * Binary is encoded in an identical principle
           *
           * @api private
           */

          exports.encodePacket = function (packet, supportsBinary, utf8encode, callback) {
            if ('function' == typeof supportsBinary) {
              callback = supportsBinary;
              supportsBinary = false;
            }

            if ('function' == typeof utf8encode) {
              callback = utf8encode;
              utf8encode = null;
            }

            var data = packet.data === undefined ? undefined : packet.data.buffer || packet.data;

            if (global.ArrayBuffer && data instanceof ArrayBuffer) {
              return encodeArrayBuffer(packet, supportsBinary, callback);
            } else if (Blob && data instanceof global.Blob) {
              return encodeBlob(packet, supportsBinary, callback);
            }

            // might be an object with { base64: true, data: dataAsBase64String }
            if (data && data.base64) {
              return encodeBase64Object(packet, callback);
            }

            // Sending data as a utf-8 string
            var encoded = packets[packet.type];

            // data fragment is optional
            if (undefined !== packet.data) {
              encoded += utf8encode ? utf8.encode(String(packet.data)) : String(packet.data);
            }

            return callback('' + encoded);
          };

          function encodeBase64Object(packet, callback) {
            // packet data is an object { base64: true, data: dataAsBase64String }
            var message = 'b' + exports.packets[packet.type] + packet.data.data;
            return callback(message);
          }

          /**
           * Encode packet helpers for binary types
           */

          function encodeArrayBuffer(packet, supportsBinary, callback) {
            if (!supportsBinary) {
              return exports.encodeBase64Packet(packet, callback);
            }

            var data = packet.data;
            var contentArray = new Uint8Array(data);
            var resultBuffer = new Uint8Array(1 + data.byteLength);

            resultBuffer[0] = packets[packet.type];
            for (var i = 0; i < contentArray.length; i++) {
              resultBuffer[i + 1] = contentArray[i];
            }

            return callback(resultBuffer.buffer);
          }

          function encodeBlobAsArrayBuffer(packet, supportsBinary, callback) {
            if (!supportsBinary) {
              return exports.encodeBase64Packet(packet, callback);
            }

            var fr = new FileReader();
            fr.onload = function () {
              packet.data = fr.result;
              exports.encodePacket(packet, supportsBinary, true, callback);
            };
            return fr.readAsArrayBuffer(packet.data);
          }

          function encodeBlob(packet, supportsBinary, callback) {
            if (!supportsBinary) {
              return exports.encodeBase64Packet(packet, callback);
            }

            if (dontSendBlobs) {
              return encodeBlobAsArrayBuffer(packet, supportsBinary, callback);
            }

            var length = new Uint8Array(1);
            length[0] = packets[packet.type];
            var blob = new Blob([length.buffer, packet.data]);

            return callback(blob);
          }

          /**
           * Encodes a packet with binary data in a base64 string
           *
           * @param {Object} packet, has `type` and `data`
           * @return {String} base64 encoded message
           */

          exports.encodeBase64Packet = function (packet, callback) {
            var message = 'b' + exports.packets[packet.type];
            if (Blob && packet.data instanceof global.Blob) {
              var fr = new FileReader();
              fr.onload = function () {
                var b64 = fr.result.split(',')[1];
                callback(message + b64);
              };
              return fr.readAsDataURL(packet.data);
            }

            var b64data;
            try {
              b64data = String.fromCharCode.apply(null, new Uint8Array(packet.data));
            } catch (e) {
              // iPhone Safari doesn't let you apply with typed arrays
              var typed = new Uint8Array(packet.data);
              var basic = new Array(typed.length);
              for (var i = 0; i < typed.length; i++) {
                basic[i] = typed[i];
              }
              b64data = String.fromCharCode.apply(null, basic);
            }
            message += global.btoa(b64data);
            return callback(message);
          };

          /**
           * Decodes a packet. Changes format to Blob if requested.
           *
           * @return {Object} with `type` and `data` (if any)
           * @api private
           */

          exports.decodePacket = function (data, binaryType, utf8decode) {
            // String data
            if (typeof data == 'string' || data === undefined) {
              if (data.charAt(0) == 'b') {
                return exports.decodeBase64Packet(data.substr(1), binaryType);
              }

              if (utf8decode) {
                try {
                  data = utf8.decode(data);
                } catch (e) {
                  return err;
                }
              }
              var type = data.charAt(0);

              if (Number(type) != type || !packetslist[type]) {
                return err;
              }

              if (data.length > 1) {
                return { type: packetslist[type], data: data.substring(1) };
              } else {
                return { type: packetslist[type] };
              }
            }

            var asArray = new Uint8Array(data);
            var type = asArray[0];
            var rest = sliceBuffer(data, 1);
            if (Blob && binaryType === 'blob') {
              rest = new Blob([rest]);
            }
            return { type: packetslist[type], data: rest };
          };

          /**
           * Decodes a packet encoded in a base64 string
           *
           * @param {String} base64 encoded message
           * @return {Object} with `type` and `data` (if any)
           */

          exports.decodeBase64Packet = function (msg, binaryType) {
            var type = packetslist[msg.charAt(0)];
            if (!global.ArrayBuffer) {
              return { type: type, data: { base64: true, data: msg.substr(1) } };
            }

            var data = base64encoder.decode(msg.substr(1));

            if (binaryType === 'blob' && Blob) {
              data = new Blob([data]);
            }

            return { type: type, data: data };
          };

          /**
           * Encodes multiple messages (payload).
           *
           *     <length>:data
           *
           * Example:
           *
           *     11:hello world2:hi
           *
           * If any contents are binary, they will be encoded as base64 strings. Base64
           * encoded strings are marked with a b before the length specifier
           *
           * @param {Array} packets
           * @api private
           */

          exports.encodePayload = function (packets, supportsBinary, callback) {
            if (typeof supportsBinary == 'function') {
              callback = supportsBinary;
              supportsBinary = null;
            }

            var isBinary = hasBinary(packets);

            if (supportsBinary && isBinary) {
              if (Blob && !dontSendBlobs) {
                return exports.encodePayloadAsBlob(packets, callback);
              }

              return exports.encodePayloadAsArrayBuffer(packets, callback);
            }

            if (!packets.length) {
              return callback('0:');
            }

            function setLengthHeader(message) {
              return message.length + ':' + message;
            }

            function encodeOne(packet, doneCallback) {
              exports.encodePacket(packet, !isBinary ? false : supportsBinary, true, function (message) {
                doneCallback(null, setLengthHeader(message));
              });
            }

            map(packets, encodeOne, function (err, results) {
              return callback(results.join(''));
            });
          };

          /**
           * Async array map using after
           */

          function map(ary, each, done) {
            var result = new Array(ary.length);
            var next = after(ary.length, done);

            var eachWithIndex = function eachWithIndex(i, el, cb) {
              each(el, function (error, msg) {
                result[i] = msg;
                cb(error, result);
              });
            };

            for (var i = 0; i < ary.length; i++) {
              eachWithIndex(i, ary[i], next);
            }
          }

          /*
           * Decodes data when a payload is maybe expected. Possible binary contents are
           * decoded from their base64 representation
           *
           * @param {String} data, callback method
           * @api public
           */

          exports.decodePayload = function (data, binaryType, callback) {
            if (typeof data != 'string') {
              return exports.decodePayloadAsBinary(data, binaryType, callback);
            }

            if (typeof binaryType === 'function') {
              callback = binaryType;
              binaryType = null;
            }

            var packet;
            if (data == '') {
              // parser error - ignoring payload
              return callback(err, 0, 1);
            }

            var length = '',
                n,
                msg;

            for (var i = 0, l = data.length; i < l; i++) {
              var chr = data.charAt(i);

              if (':' != chr) {
                length += chr;
              } else {
                if ('' == length || length != (n = Number(length))) {
                  // parser error - ignoring payload
                  return callback(err, 0, 1);
                }

                msg = data.substr(i + 1, n);

                if (length != msg.length) {
                  // parser error - ignoring payload
                  return callback(err, 0, 1);
                }

                if (msg.length) {
                  packet = exports.decodePacket(msg, binaryType, true);

                  if (err.type == packet.type && err.data == packet.data) {
                    // parser error in individual packet - ignoring payload
                    return callback(err, 0, 1);
                  }

                  var ret = callback(packet, i + n, l);
                  if (false === ret) return;
                }

                // advance cursor
                i += n;
                length = '';
              }
            }

            if (length != '') {
              // parser error - ignoring payload
              return callback(err, 0, 1);
            }
          };

          /**
           * Encodes multiple messages (payload) as binary.
           *
           * <1 = binary, 0 = string><number from 0-9><number from 0-9>[...]<number
           * 255><data>
           *
           * Example:
           * 1 3 255 1 2 3, if the binary contents are interpreted as 8 bit integers
           *
           * @param {Array} packets
           * @return {ArrayBuffer} encoded payload
           * @api private
           */

          exports.encodePayloadAsArrayBuffer = function (packets, callback) {
            if (!packets.length) {
              return callback(new ArrayBuffer(0));
            }

            function encodeOne(packet, doneCallback) {
              exports.encodePacket(packet, true, true, function (data) {
                return doneCallback(null, data);
              });
            }

            map(packets, encodeOne, function (err, encodedPackets) {
              var totalLength = encodedPackets.reduce(function (acc, p) {
                var len;
                if (typeof p === 'string') {
                  len = p.length;
                } else {
                  len = p.byteLength;
                }
                return acc + len.toString().length + len + 2; // string/binary identifier + separator = 2
              }, 0);

              var resultArray = new Uint8Array(totalLength);

              var bufferIndex = 0;
              encodedPackets.forEach(function (p) {
                var isString = typeof p === 'string';
                var ab = p;
                if (isString) {
                  var view = new Uint8Array(p.length);
                  for (var i = 0; i < p.length; i++) {
                    view[i] = p.charCodeAt(i);
                  }
                  ab = view.buffer;
                }

                if (isString) {
                  // not true binary
                  resultArray[bufferIndex++] = 0;
                } else {
                  // true binary
                  resultArray[bufferIndex++] = 1;
                }

                var lenStr = ab.byteLength.toString();
                for (var i = 0; i < lenStr.length; i++) {
                  resultArray[bufferIndex++] = parseInt(lenStr[i]);
                }
                resultArray[bufferIndex++] = 255;

                var view = new Uint8Array(ab);
                for (var i = 0; i < view.length; i++) {
                  resultArray[bufferIndex++] = view[i];
                }
              });

              return callback(resultArray.buffer);
            });
          };

          /**
           * Encode as Blob
           */

          exports.encodePayloadAsBlob = function (packets, callback) {
            function encodeOne(packet, doneCallback) {
              exports.encodePacket(packet, true, true, function (encoded) {
                var binaryIdentifier = new Uint8Array(1);
                binaryIdentifier[0] = 1;
                if (typeof encoded === 'string') {
                  var view = new Uint8Array(encoded.length);
                  for (var i = 0; i < encoded.length; i++) {
                    view[i] = encoded.charCodeAt(i);
                  }
                  encoded = view.buffer;
                  binaryIdentifier[0] = 0;
                }

                var len = encoded instanceof ArrayBuffer ? encoded.byteLength : encoded.size;

                var lenStr = len.toString();
                var lengthAry = new Uint8Array(lenStr.length + 1);
                for (var i = 0; i < lenStr.length; i++) {
                  lengthAry[i] = parseInt(lenStr[i]);
                }
                lengthAry[lenStr.length] = 255;

                if (Blob) {
                  var blob = new Blob([binaryIdentifier.buffer, lengthAry.buffer, encoded]);
                  doneCallback(null, blob);
                }
              });
            }

            map(packets, encodeOne, function (err, results) {
              return callback(new Blob(results));
            });
          };

          /*
           * Decodes data when a payload is maybe expected. Strings are decoded by
           * interpreting each byte as a key code for entries marked to start with 0. See
           * description of encodePayloadAsBinary
           *
           * @param {ArrayBuffer} data, callback method
           * @api public
           */

          exports.decodePayloadAsBinary = function (data, binaryType, callback) {
            if (typeof binaryType === 'function') {
              callback = binaryType;
              binaryType = null;
            }

            var bufferTail = data;
            var buffers = [];

            var numberTooLong = false;
            while (bufferTail.byteLength > 0) {
              var tailArray = new Uint8Array(bufferTail);
              var isString = tailArray[0] === 0;
              var msgLength = '';

              for (var i = 1;; i++) {
                if (tailArray[i] == 255) break;

                if (msgLength.length > 310) {
                  numberTooLong = true;
                  break;
                }

                msgLength += tailArray[i];
              }

              if (numberTooLong) return callback(err, 0, 1);

              bufferTail = sliceBuffer(bufferTail, 2 + msgLength.length);
              msgLength = parseInt(msgLength);

              var msg = sliceBuffer(bufferTail, 0, msgLength);
              if (isString) {
                try {
                  msg = String.fromCharCode.apply(null, new Uint8Array(msg));
                } catch (e) {
                  // iPhone Safari doesn't let you apply to typed arrays
                  var typed = new Uint8Array(msg);
                  msg = '';
                  for (var i = 0; i < typed.length; i++) {
                    msg += String.fromCharCode(typed[i]);
                  }
                }
              }

              buffers.push(msg);
              bufferTail = sliceBuffer(bufferTail, msgLength);
            }

            var total = buffers.length;
            buffers.forEach(function (buffer, i) {
              callback(exports.decodePacket(buffer, binaryType, true), i, total);
            });
          };
        }).call(this, typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {});
      }, { "./keys": 28, "after": 6, "arraybuffer.slice": 7, "base64-arraybuffer": 9, "blob": 10, "has-binary": 29, "utf8": 45 }], 28: [function (_dereq_, module, exports) {

        /**
         * Gets the keys for an object.
         *
         * @return {Array} keys
         * @api private
         */

        module.exports = Object.keys || function keys(obj) {
          var arr = [];
          var has = Object.prototype.hasOwnProperty;

          for (var i in obj) {
            if (has.call(obj, i)) {
              arr.push(i);
            }
          }
          return arr;
        };
      }, {}], 29: [function (_dereq_, module, exports) {
        (function (global) {

          /*
           * Module requirements.
           */

          var isArray = _dereq_('isarray');

          /**
           * Module exports.
           */

          module.exports = hasBinary;

          /**
           * Checks for binary data.
           *
           * Right now only Buffer and ArrayBuffer are supported..
           *
           * @param {Object} anything
           * @api public
           */

          function hasBinary(data) {

            function _hasBinary(obj) {
              if (!obj) return false;

              if (global.Buffer && global.Buffer.isBuffer(obj) || global.ArrayBuffer && obj instanceof ArrayBuffer || global.Blob && obj instanceof Blob || global.File && obj instanceof File) {
                return true;
              }

              if (isArray(obj)) {
                for (var i = 0; i < obj.length; i++) {
                  if (_hasBinary(obj[i])) {
                    return true;
                  }
                }
              } else if (obj && 'object' == (typeof obj === "undefined" ? "undefined" : _typeof(obj))) {
                if (obj.toJSON) {
                  obj = obj.toJSON();
                }

                for (var key in obj) {
                  if (Object.prototype.hasOwnProperty.call(obj, key) && _hasBinary(obj[key])) {
                    return true;
                  }
                }
              }

              return false;
            }

            return _hasBinary(data);
          }
        }).call(this, typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {});
      }, { "isarray": 34 }], 30: [function (_dereq_, module, exports) {

        /**
         * Returns `this`. Execute this without a "context" (i.e. without it being
         * attached to an object of the left-hand side), and `this` points to the
         * "global" scope of the current JS execution.
         */

        module.exports = function () {
          return this;
        }();
      }, {}], 31: [function (_dereq_, module, exports) {
        (function (global) {

          /*
           * Module requirements.
           */

          var isArray = _dereq_('isarray');

          /**
           * Module exports.
           */

          module.exports = hasBinary;

          /**
           * Checks for binary data.
           *
           * Right now only Buffer and ArrayBuffer are supported..
           *
           * @param {Object} anything
           * @api public
           */

          function hasBinary(data) {

            function _hasBinary(obj) {
              if (!obj) return false;

              if (global.Buffer && global.Buffer.isBuffer && global.Buffer.isBuffer(obj) || global.ArrayBuffer && obj instanceof ArrayBuffer || global.Blob && obj instanceof Blob || global.File && obj instanceof File) {
                return true;
              }

              if (isArray(obj)) {
                for (var i = 0; i < obj.length; i++) {
                  if (_hasBinary(obj[i])) {
                    return true;
                  }
                }
              } else if (obj && 'object' == (typeof obj === "undefined" ? "undefined" : _typeof(obj))) {
                // see: https://github.com/Automattic/has-binary/pull/4
                if (obj.toJSON && 'function' == typeof obj.toJSON) {
                  obj = obj.toJSON();
                }

                for (var key in obj) {
                  if (Object.prototype.hasOwnProperty.call(obj, key) && _hasBinary(obj[key])) {
                    return true;
                  }
                }
              }

              return false;
            }

            return _hasBinary(data);
          }
        }).call(this, typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {});
      }, { "isarray": 34 }], 32: [function (_dereq_, module, exports) {

        /**
         * Module dependencies.
         */

        var global = _dereq_('global');

        /**
         * Module exports.
         *
         * Logic borrowed from Modernizr:
         *
         *   - https://github.com/Modernizr/Modernizr/blob/master/feature-detects/cors.js
         */

        try {
          module.exports = 'XMLHttpRequest' in global && 'withCredentials' in new global.XMLHttpRequest();
        } catch (err) {
          // if XMLHttp support is disabled in IE then it will throw
          // when trying to create
          module.exports = false;
        }
      }, { "global": 30 }], 33: [function (_dereq_, module, exports) {

        var indexOf = [].indexOf;

        module.exports = function (arr, obj) {
          if (indexOf) return arr.indexOf(obj);
          for (var i = 0; i < arr.length; ++i) {
            if (arr[i] === obj) return i;
          }
          return -1;
        };
      }, {}], 34: [function (_dereq_, module, exports) {
        module.exports = Array.isArray || function (arr) {
          return Object.prototype.toString.call(arr) == '[object Array]';
        };
      }, {}], 35: [function (_dereq_, module, exports) {
        (function (global) {
          /*! JSON v3.3.2 | http://bestiejs.github.io/json3 | Copyright 2012-2014, Kit Cambridge | http://kit.mit-license.org */
          ;(function () {
            // Detect the `define` function exposed by asynchronous module loaders. The
            // strict `define` check is necessary for compatibility with `r.js`.
            var isLoader = typeof define === "function" && define.amd;

            // A set of types used to distinguish objects from primitives.
            var objectTypes = {
              "function": true,
              "object": true
            };

            // Detect the `exports` object exposed by CommonJS implementations.
            var freeExports = objectTypes[typeof exports === "undefined" ? "undefined" : _typeof(exports)] && exports && !exports.nodeType && exports;

            // Use the `global` object exposed by Node (including Browserify via
            // `insert-module-globals`), Narwhal, and Ringo as the default context,
            // and the `window` object in browsers. Rhino exports a `global` function
            // instead.
            var root = objectTypes[typeof window === "undefined" ? "undefined" : _typeof(window)] && window || this,
                freeGlobal = freeExports && objectTypes[typeof module === "undefined" ? "undefined" : _typeof(module)] && module && !module.nodeType && (typeof global === "undefined" ? "undefined" : _typeof(global)) == "object" && global;

            if (freeGlobal && (freeGlobal["global"] === freeGlobal || freeGlobal["window"] === freeGlobal || freeGlobal["self"] === freeGlobal)) {
              root = freeGlobal;
            }

            // Public: Initializes JSON 3 using the given `context` object, attaching the
            // `stringify` and `parse` functions to the specified `exports` object.
            function runInContext(context, exports) {
              context || (context = root["Object"]());
              exports || (exports = root["Object"]());

              // Native constructor aliases.
              var Number = context["Number"] || root["Number"],
                  String = context["String"] || root["String"],
                  Object = context["Object"] || root["Object"],
                  Date = context["Date"] || root["Date"],
                  SyntaxError = context["SyntaxError"] || root["SyntaxError"],
                  TypeError = context["TypeError"] || root["TypeError"],
                  Math = context["Math"] || root["Math"],
                  nativeJSON = context["JSON"] || root["JSON"];

              // Delegate to the native `stringify` and `parse` implementations.
              if ((typeof nativeJSON === "undefined" ? "undefined" : _typeof(nativeJSON)) == "object" && nativeJSON) {
                exports.stringify = nativeJSON.stringify;
                exports.parse = nativeJSON.parse;
              }

              // Convenience aliases.
              var objectProto = Object.prototype,
                  getClass = objectProto.toString,
                  _isProperty,
                  _forEach,
                  undef;

              // Test the `Date#getUTC*` methods. Based on work by @Yaffle.
              var isExtended = new Date(-3509827334573292);
              try {
                // The `getUTCFullYear`, `Month`, and `Date` methods return nonsensical
                // results for certain dates in Opera >= 10.53.
                isExtended = isExtended.getUTCFullYear() == -109252 && isExtended.getUTCMonth() === 0 && isExtended.getUTCDate() === 1 &&
                // Safari < 2.0.2 stores the internal millisecond time value correctly,
                // but clips the values returned by the date methods to the range of
                // signed 32-bit integers ([-2 ** 31, 2 ** 31 - 1]).
                isExtended.getUTCHours() == 10 && isExtended.getUTCMinutes() == 37 && isExtended.getUTCSeconds() == 6 && isExtended.getUTCMilliseconds() == 708;
              } catch (exception) {}

              // Internal: Determines whether the native `JSON.stringify` and `parse`
              // implementations are spec-compliant. Based on work by Ken Snyder.
              function has(name) {
                if (has[name] !== undef) {
                  // Return cached feature test result.
                  return has[name];
                }
                var isSupported;
                if (name == "bug-string-char-index") {
                  // IE <= 7 doesn't support accessing string characters using square
                  // bracket notation. IE 8 only supports this for primitives.
                  isSupported = "a"[0] != "a";
                } else if (name == "json") {
                  // Indicates whether both `JSON.stringify` and `JSON.parse` are
                  // supported.
                  isSupported = has("json-stringify") && has("json-parse");
                } else {
                  var value,
                      serialized = "{\"a\":[1,true,false,null,\"\\u0000\\b\\n\\f\\r\\t\"]}";
                  // Test `JSON.stringify`.
                  if (name == "json-stringify") {
                    var stringify = exports.stringify,
                        stringifySupported = typeof stringify == "function" && isExtended;
                    if (stringifySupported) {
                      // A test function object with a custom `toJSON` method.
                      (value = function value() {
                        return 1;
                      }).toJSON = value;
                      try {
                        stringifySupported =
                        // Firefox 3.1b1 and b2 serialize string, number, and boolean
                        // primitives as object literals.
                        stringify(0) === "0" &&
                        // FF 3.1b1, b2, and JSON 2 serialize wrapped primitives as object
                        // literals.
                        stringify(new Number()) === "0" && stringify(new String()) == '""' &&
                        // FF 3.1b1, 2 throw an error if the value is `null`, `undefined`, or
                        // does not define a canonical JSON representation (this applies to
                        // objects with `toJSON` properties as well, *unless* they are nested
                        // within an object or array).
                        stringify(getClass) === undef &&
                        // IE 8 serializes `undefined` as `"undefined"`. Safari <= 5.1.7 and
                        // FF 3.1b3 pass this test.
                        stringify(undef) === undef &&
                        // Safari <= 5.1.7 and FF 3.1b3 throw `Error`s and `TypeError`s,
                        // respectively, if the value is omitted entirely.
                        stringify() === undef &&
                        // FF 3.1b1, 2 throw an error if the given value is not a number,
                        // string, array, object, Boolean, or `null` literal. This applies to
                        // objects with custom `toJSON` methods as well, unless they are nested
                        // inside object or array literals. YUI 3.0.0b1 ignores custom `toJSON`
                        // methods entirely.
                        stringify(value) === "1" && stringify([value]) == "[1]" &&
                        // Prototype <= 1.6.1 serializes `[undefined]` as `"[]"` instead of
                        // `"[null]"`.
                        stringify([undef]) == "[null]" &&
                        // YUI 3.0.0b1 fails to serialize `null` literals.
                        stringify(null) == "null" &&
                        // FF 3.1b1, 2 halts serialization if an array contains a function:
                        // `[1, true, getClass, 1]` serializes as "[1,true,],". FF 3.1b3
                        // elides non-JSON values from objects and arrays, unless they
                        // define custom `toJSON` methods.
                        stringify([undef, getClass, null]) == "[null,null,null]" &&
                        // Simple serialization test. FF 3.1b1 uses Unicode escape sequences
                        // where character escape codes are expected (e.g., `\b` => `\u0008`).
                        stringify({ "a": [value, true, false, null, "\x00\b\n\f\r\t"] }) == serialized &&
                        // FF 3.1b1 and b2 ignore the `filter` and `width` arguments.
                        stringify(null, value) === "1" && stringify([1, 2], null, 1) == "[\n 1,\n 2\n]" &&
                        // JSON 2, Prototype <= 1.7, and older WebKit builds incorrectly
                        // serialize extended years.
                        stringify(new Date(-8.64e15)) == '"-271821-04-20T00:00:00.000Z"' &&
                        // The milliseconds are optional in ES 5, but required in 5.1.
                        stringify(new Date(8.64e15)) == '"+275760-09-13T00:00:00.000Z"' &&
                        // Firefox <= 11.0 incorrectly serializes years prior to 0 as negative
                        // four-digit years instead of six-digit years. Credits: @Yaffle.
                        stringify(new Date(-621987552e5)) == '"-000001-01-01T00:00:00.000Z"' &&
                        // Safari <= 5.1.5 and Opera >= 10.53 incorrectly serialize millisecond
                        // values less than 1000. Credits: @Yaffle.
                        stringify(new Date(-1)) == '"1969-12-31T23:59:59.999Z"';
                      } catch (exception) {
                        stringifySupported = false;
                      }
                    }
                    isSupported = stringifySupported;
                  }
                  // Test `JSON.parse`.
                  if (name == "json-parse") {
                    var parse = exports.parse;
                    if (typeof parse == "function") {
                      try {
                        // FF 3.1b1, b2 will throw an exception if a bare literal is provided.
                        // Conforming implementations should also coerce the initial argument to
                        // a string prior to parsing.
                        if (parse("0") === 0 && !parse(false)) {
                          // Simple parsing test.
                          value = parse(serialized);
                          var parseSupported = value["a"].length == 5 && value["a"][0] === 1;
                          if (parseSupported) {
                            try {
                              // Safari <= 5.1.2 and FF 3.1b1 allow unescaped tabs in strings.
                              parseSupported = !parse('"\t"');
                            } catch (exception) {}
                            if (parseSupported) {
                              try {
                                // FF 4.0 and 4.0.1 allow leading `+` signs and leading
                                // decimal points. FF 4.0, 4.0.1, and IE 9-10 also allow
                                // certain octal literals.
                                parseSupported = parse("01") !== 1;
                              } catch (exception) {}
                            }
                            if (parseSupported) {
                              try {
                                // FF 4.0, 4.0.1, and Rhino 1.7R3-R4 allow trailing decimal
                                // points. These environments, along with FF 3.1b1 and 2,
                                // also allow trailing commas in JSON objects and arrays.
                                parseSupported = parse("1.") !== 1;
                              } catch (exception) {}
                            }
                          }
                        }
                      } catch (exception) {
                        parseSupported = false;
                      }
                    }
                    isSupported = parseSupported;
                  }
                }
                return has[name] = !!isSupported;
              }

              if (!has("json")) {
                // Common `[[Class]]` name aliases.
                var functionClass = "[object Function]",
                    dateClass = "[object Date]",
                    numberClass = "[object Number]",
                    stringClass = "[object String]",
                    arrayClass = "[object Array]",
                    booleanClass = "[object Boolean]";

                // Detect incomplete support for accessing string characters by index.
                var charIndexBuggy = has("bug-string-char-index");

                // Define additional utility methods if the `Date` methods are buggy.
                if (!isExtended) {
                  var floor = Math.floor;
                  // A mapping between the months of the year and the number of days between
                  // January 1st and the first of the respective month.
                  var Months = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334];
                  // Internal: Calculates the number of days between the Unix epoch and the
                  // first day of the given month.
                  var getDay = function getDay(year, month) {
                    return Months[month] + 365 * (year - 1970) + floor((year - 1969 + (month = +(month > 1))) / 4) - floor((year - 1901 + month) / 100) + floor((year - 1601 + month) / 400);
                  };
                }

                // Internal: Determines if a property is a direct property of the given
                // object. Delegates to the native `Object#hasOwnProperty` method.
                if (!(_isProperty = objectProto.hasOwnProperty)) {
                  _isProperty = function isProperty(property) {
                    var members = {},
                        constructor;
                    if ((members.__proto__ = null, members.__proto__ = {
                      // The *proto* property cannot be set multiple times in recent
                      // versions of Firefox and SeaMonkey.
                      "toString": 1
                    }, members).toString != getClass) {
                      // Safari <= 2.0.3 doesn't implement `Object#hasOwnProperty`, but
                      // supports the mutable *proto* property.
                      _isProperty = function isProperty(property) {
                        // Capture and break the object's prototype chain (see section 8.6.2
                        // of the ES 5.1 spec). The parenthesized expression prevents an
                        // unsafe transformation by the Closure Compiler.
                        var original = this.__proto__,
                            result = property in (this.__proto__ = null, this);
                        // Restore the original prototype chain.
                        this.__proto__ = original;
                        return result;
                      };
                    } else {
                      // Capture a reference to the top-level `Object` constructor.
                      constructor = members.constructor;
                      // Use the `constructor` property to simulate `Object#hasOwnProperty` in
                      // other environments.
                      _isProperty = function isProperty(property) {
                        var parent = (this.constructor || constructor).prototype;
                        return property in this && !(property in parent && this[property] === parent[property]);
                      };
                    }
                    members = null;
                    return _isProperty.call(this, property);
                  };
                }

                // Internal: Normalizes the `for...in` iteration algorithm across
                // environments. Each enumerated key is yielded to a `callback` function.
                _forEach = function forEach(object, callback) {
                  var size = 0,
                      Properties,
                      members,
                      property;

                  // Tests for bugs in the current environment's `for...in` algorithm. The
                  // `valueOf` property inherits the non-enumerable flag from
                  // `Object.prototype` in older versions of IE, Netscape, and Mozilla.
                  (Properties = function Properties() {
                    this.valueOf = 0;
                  }).prototype.valueOf = 0;

                  // Iterate over a new instance of the `Properties` class.
                  members = new Properties();
                  for (property in members) {
                    // Ignore all properties inherited from `Object.prototype`.
                    if (_isProperty.call(members, property)) {
                      size++;
                    }
                  }
                  Properties = members = null;

                  // Normalize the iteration algorithm.
                  if (!size) {
                    // A list of non-enumerable properties inherited from `Object.prototype`.
                    members = ["valueOf", "toString", "toLocaleString", "propertyIsEnumerable", "isPrototypeOf", "hasOwnProperty", "constructor"];
                    // IE <= 8, Mozilla 1.0, and Netscape 6.2 ignore shadowed non-enumerable
                    // properties.
                    _forEach = function forEach(object, callback) {
                      var isFunction = getClass.call(object) == functionClass,
                          property,
                          length;
                      var hasProperty = !isFunction && typeof object.constructor != "function" && objectTypes[_typeof(object.hasOwnProperty)] && object.hasOwnProperty || _isProperty;
                      for (property in object) {
                        // Gecko <= 1.0 enumerates the `prototype` property of functions under
                        // certain conditions; IE does not.
                        if (!(isFunction && property == "prototype") && hasProperty.call(object, property)) {
                          callback(property);
                        }
                      }
                      // Manually invoke the callback for each non-enumerable property.
                      for (length = members.length; property = members[--length]; hasProperty.call(object, property) && callback(property)) {}
                    };
                  } else if (size == 2) {
                    // Safari <= 2.0.4 enumerates shadowed properties twice.
                    _forEach = function forEach(object, callback) {
                      // Create a set of iterated properties.
                      var members = {},
                          isFunction = getClass.call(object) == functionClass,
                          property;
                      for (property in object) {
                        // Store each property name to prevent double enumeration. The
                        // `prototype` property of functions is not enumerated due to cross-
                        // environment inconsistencies.
                        if (!(isFunction && property == "prototype") && !_isProperty.call(members, property) && (members[property] = 1) && _isProperty.call(object, property)) {
                          callback(property);
                        }
                      }
                    };
                  } else {
                    // No bugs detected; use the standard `for...in` algorithm.
                    _forEach = function forEach(object, callback) {
                      var isFunction = getClass.call(object) == functionClass,
                          property,
                          isConstructor;
                      for (property in object) {
                        if (!(isFunction && property == "prototype") && _isProperty.call(object, property) && !(isConstructor = property === "constructor")) {
                          callback(property);
                        }
                      }
                      // Manually invoke the callback for the `constructor` property due to
                      // cross-environment inconsistencies.
                      if (isConstructor || _isProperty.call(object, property = "constructor")) {
                        callback(property);
                      }
                    };
                  }
                  return _forEach(object, callback);
                };

                // Public: Serializes a JavaScript `value` as a JSON string. The optional
                // `filter` argument may specify either a function that alters how object and
                // array members are serialized, or an array of strings and numbers that
                // indicates which properties should be serialized. The optional `width`
                // argument may be either a string or number that specifies the indentation
                // level of the output.
                if (!has("json-stringify")) {
                  // Internal: A map of control characters and their escaped equivalents.
                  var Escapes = {
                    92: "\\\\",
                    34: '\\"',
                    8: "\\b",
                    12: "\\f",
                    10: "\\n",
                    13: "\\r",
                    9: "\\t"
                  };

                  // Internal: Converts `value` into a zero-padded string such that its
                  // length is at least equal to `width`. The `width` must be <= 6.
                  var leadingZeroes = "000000";
                  var toPaddedString = function toPaddedString(width, value) {
                    // The `|| 0` expression is necessary to work around a bug in
                    // Opera <= 7.54u2 where `0 == -0`, but `String(-0) !== "0"`.
                    return (leadingZeroes + (value || 0)).slice(-width);
                  };

                  // Internal: Double-quotes a string `value`, replacing all ASCII control
                  // characters (characters with code unit values between 0 and 31) with
                  // their escaped equivalents. This is an implementation of the
                  // `Quote(value)` operation defined in ES 5.1 section 15.12.3.
                  var unicodePrefix = "\\u00";
                  var quote = function quote(value) {
                    var result = '"',
                        index = 0,
                        length = value.length,
                        useCharIndex = !charIndexBuggy || length > 10;
                    var symbols = useCharIndex && (charIndexBuggy ? value.split("") : value);
                    for (; index < length; index++) {
                      var charCode = value.charCodeAt(index);
                      // If the character is a control character, append its Unicode or
                      // shorthand escape sequence; otherwise, append the character as-is.
                      switch (charCode) {
                        case 8:case 9:case 10:case 12:case 13:case 34:case 92:
                          result += Escapes[charCode];
                          break;
                        default:
                          if (charCode < 32) {
                            result += unicodePrefix + toPaddedString(2, charCode.toString(16));
                            break;
                          }
                          result += useCharIndex ? symbols[index] : value.charAt(index);
                      }
                    }
                    return result + '"';
                  };

                  // Internal: Recursively serializes an object. Implements the
                  // `Str(key, holder)`, `JO(value)`, and `JA(value)` operations.
                  var serialize = function serialize(property, object, callback, properties, whitespace, indentation, stack) {
                    var value, className, year, month, date, time, hours, minutes, seconds, milliseconds, results, element, index, length, prefix, result;
                    try {
                      // Necessary for host object support.
                      value = object[property];
                    } catch (exception) {}
                    if ((typeof value === "undefined" ? "undefined" : _typeof(value)) == "object" && value) {
                      className = getClass.call(value);
                      if (className == dateClass && !_isProperty.call(value, "toJSON")) {
                        if (value > -1 / 0 && value < 1 / 0) {
                          // Dates are serialized according to the `Date#toJSON` method
                          // specified in ES 5.1 section 15.9.5.44. See section 15.9.1.15
                          // for the ISO 8601 date time string format.
                          if (getDay) {
                            // Manually compute the year, month, date, hours, minutes,
                            // seconds, and milliseconds if the `getUTC*` methods are
                            // buggy. Adapted from @Yaffle's `date-shim` project.
                            date = floor(value / 864e5);
                            for (year = floor(date / 365.2425) + 1970 - 1; getDay(year + 1, 0) <= date; year++) {}
                            for (month = floor((date - getDay(year, 0)) / 30.42); getDay(year, month + 1) <= date; month++) {}
                            date = 1 + date - getDay(year, month);
                            // The `time` value specifies the time within the day (see ES
                            // 5.1 section 15.9.1.2). The formula `(A % B + B) % B` is used
                            // to compute `A modulo B`, as the `%` operator does not
                            // correspond to the `modulo` operation for negative numbers.
                            time = (value % 864e5 + 864e5) % 864e5;
                            // The hours, minutes, seconds, and milliseconds are obtained by
                            // decomposing the time within the day. See section 15.9.1.10.
                            hours = floor(time / 36e5) % 24;
                            minutes = floor(time / 6e4) % 60;
                            seconds = floor(time / 1e3) % 60;
                            milliseconds = time % 1e3;
                          } else {
                            year = value.getUTCFullYear();
                            month = value.getUTCMonth();
                            date = value.getUTCDate();
                            hours = value.getUTCHours();
                            minutes = value.getUTCMinutes();
                            seconds = value.getUTCSeconds();
                            milliseconds = value.getUTCMilliseconds();
                          }
                          // Serialize extended years correctly.
                          value = (year <= 0 || year >= 1e4 ? (year < 0 ? "-" : "+") + toPaddedString(6, year < 0 ? -year : year) : toPaddedString(4, year)) + "-" + toPaddedString(2, month + 1) + "-" + toPaddedString(2, date) +
                          // Months, dates, hours, minutes, and seconds should have two
                          // digits; milliseconds should have three.
                          "T" + toPaddedString(2, hours) + ":" + toPaddedString(2, minutes) + ":" + toPaddedString(2, seconds) +
                          // Milliseconds are optional in ES 5.0, but required in 5.1.
                          "." + toPaddedString(3, milliseconds) + "Z";
                        } else {
                          value = null;
                        }
                      } else if (typeof value.toJSON == "function" && (className != numberClass && className != stringClass && className != arrayClass || _isProperty.call(value, "toJSON"))) {
                        // Prototype <= 1.6.1 adds non-standard `toJSON` methods to the
                        // `Number`, `String`, `Date`, and `Array` prototypes. JSON 3
                        // ignores all `toJSON` methods on these objects unless they are
                        // defined directly on an instance.
                        value = value.toJSON(property);
                      }
                    }
                    if (callback) {
                      // If a replacement function was provided, call it to obtain the value
                      // for serialization.
                      value = callback.call(object, property, value);
                    }
                    if (value === null) {
                      return "null";
                    }
                    className = getClass.call(value);
                    if (className == booleanClass) {
                      // Booleans are represented literally.
                      return "" + value;
                    } else if (className == numberClass) {
                      // JSON numbers must be finite. `Infinity` and `NaN` are serialized as
                      // `"null"`.
                      return value > -1 / 0 && value < 1 / 0 ? "" + value : "null";
                    } else if (className == stringClass) {
                      // Strings are double-quoted and escaped.
                      return quote("" + value);
                    }
                    // Recursively serialize objects and arrays.
                    if ((typeof value === "undefined" ? "undefined" : _typeof(value)) == "object") {
                      // Check for cyclic structures. This is a linear search; performance
                      // is inversely proportional to the number of unique nested objects.
                      for (length = stack.length; length--;) {
                        if (stack[length] === value) {
                          // Cyclic structures cannot be serialized by `JSON.stringify`.
                          throw TypeError();
                        }
                      }
                      // Add the object to the stack of traversed objects.
                      stack.push(value);
                      results = [];
                      // Save the current indentation level and indent one additional level.
                      prefix = indentation;
                      indentation += whitespace;
                      if (className == arrayClass) {
                        // Recursively serialize array elements.
                        for (index = 0, length = value.length; index < length; index++) {
                          element = serialize(index, value, callback, properties, whitespace, indentation, stack);
                          results.push(element === undef ? "null" : element);
                        }
                        result = results.length ? whitespace ? "[\n" + indentation + results.join(",\n" + indentation) + "\n" + prefix + "]" : "[" + results.join(",") + "]" : "[]";
                      } else {
                        // Recursively serialize object members. Members are selected from
                        // either a user-specified list of property names, or the object
                        // itself.
                        _forEach(properties || value, function (property) {
                          var element = serialize(property, value, callback, properties, whitespace, indentation, stack);
                          if (element !== undef) {
                            // According to ES 5.1 section 15.12.3: "If `gap` {whitespace}
                            // is not the empty string, let `member` {quote(property) + ":"}
                            // be the concatenation of `member` and the `space` character."
                            // The "`space` character" refers to the literal space
                            // character, not the `space` {width} argument provided to
                            // `JSON.stringify`.
                            results.push(quote(property) + ":" + (whitespace ? " " : "") + element);
                          }
                        });
                        result = results.length ? whitespace ? "{\n" + indentation + results.join(",\n" + indentation) + "\n" + prefix + "}" : "{" + results.join(",") + "}" : "{}";
                      }
                      // Remove the object from the traversed object stack.
                      stack.pop();
                      return result;
                    }
                  };

                  // Public: `JSON.stringify`. See ES 5.1 section 15.12.3.
                  exports.stringify = function (source, filter, width) {
                    var whitespace, callback, properties, className;
                    if (objectTypes[typeof filter === "undefined" ? "undefined" : _typeof(filter)] && filter) {
                      if ((className = getClass.call(filter)) == functionClass) {
                        callback = filter;
                      } else if (className == arrayClass) {
                        // Convert the property names array into a makeshift set.
                        properties = {};
                        for (var index = 0, length = filter.length, value; index < length; value = filter[index++], (className = getClass.call(value), className == stringClass || className == numberClass) && (properties[value] = 1)) {}
                      }
                    }
                    if (width) {
                      if ((className = getClass.call(width)) == numberClass) {
                        // Convert the `width` to an integer and create a string containing
                        // `width` number of space characters.
                        if ((width -= width % 1) > 0) {
                          for (whitespace = "", width > 10 && (width = 10); whitespace.length < width; whitespace += " ") {}
                        }
                      } else if (className == stringClass) {
                        whitespace = width.length <= 10 ? width : width.slice(0, 10);
                      }
                    }
                    // Opera <= 7.54u2 discards the values associated with empty string keys
                    // (`""`) only if they are used directly within an object member list
                    // (e.g., `!("" in { "": 1})`).
                    return serialize("", (value = {}, value[""] = source, value), callback, properties, whitespace, "", []);
                  };
                }

                // Public: Parses a JSON source string.
                if (!has("json-parse")) {
                  var fromCharCode = String.fromCharCode;

                  // Internal: A map of escaped control characters and their unescaped
                  // equivalents.
                  var Unescapes = {
                    92: "\\",
                    34: '"',
                    47: "/",
                    98: "\b",
                    116: "\t",
                    110: "\n",
                    102: "\f",
                    114: "\r"
                  };

                  // Internal: Stores the parser state.
                  var Index, Source;

                  // Internal: Resets the parser state and throws a `SyntaxError`.
                  var abort = function abort() {
                    Index = Source = null;
                    throw SyntaxError();
                  };

                  // Internal: Returns the next token, or `"$"` if the parser has reached
                  // the end of the source string. A token may be a string, number, `null`
                  // literal, or Boolean literal.
                  var lex = function lex() {
                    var source = Source,
                        length = source.length,
                        value,
                        begin,
                        position,
                        isSigned,
                        charCode;
                    while (Index < length) {
                      charCode = source.charCodeAt(Index);
                      switch (charCode) {
                        case 9:case 10:case 13:case 32:
                          // Skip whitespace tokens, including tabs, carriage returns, line
                          // feeds, and space characters.
                          Index++;
                          break;
                        case 123:case 125:case 91:case 93:case 58:case 44:
                          // Parse a punctuator token (`{`, `}`, `[`, `]`, `:`, or `,`) at
                          // the current position.
                          value = charIndexBuggy ? source.charAt(Index) : source[Index];
                          Index++;
                          return value;
                        case 34:
                          // `"` delimits a JSON string; advance to the next character and
                          // begin parsing the string. String tokens are prefixed with the
                          // sentinel `@` character to distinguish them from punctuators and
                          // end-of-string tokens.
                          for (value = "@", Index++; Index < length;) {
                            charCode = source.charCodeAt(Index);
                            if (charCode < 32) {
                              // Unescaped ASCII control characters (those with a code unit
                              // less than the space character) are not permitted.
                              abort();
                            } else if (charCode == 92) {
                              // A reverse solidus (`\`) marks the beginning of an escaped
                              // control character (including `"`, `\`, and `/`) or Unicode
                              // escape sequence.
                              charCode = source.charCodeAt(++Index);
                              switch (charCode) {
                                case 92:case 34:case 47:case 98:case 116:case 110:case 102:case 114:
                                  // Revive escaped control characters.
                                  value += Unescapes[charCode];
                                  Index++;
                                  break;
                                case 117:
                                  // `\u` marks the beginning of a Unicode escape sequence.
                                  // Advance to the first character and validate the
                                  // four-digit code point.
                                  begin = ++Index;
                                  for (position = Index + 4; Index < position; Index++) {
                                    charCode = source.charCodeAt(Index);
                                    // A valid sequence comprises four hexdigits (case-
                                    // insensitive) that form a single hexadecimal value.
                                    if (!(charCode >= 48 && charCode <= 57 || charCode >= 97 && charCode <= 102 || charCode >= 65 && charCode <= 70)) {
                                      // Invalid Unicode escape sequence.
                                      abort();
                                    }
                                  }
                                  // Revive the escaped character.
                                  value += fromCharCode("0x" + source.slice(begin, Index));
                                  break;
                                default:
                                  // Invalid escape sequence.
                                  abort();
                              }
                            } else {
                              if (charCode == 34) {
                                // An unescaped double-quote character marks the end of the
                                // string.
                                break;
                              }
                              charCode = source.charCodeAt(Index);
                              begin = Index;
                              // Optimize for the common case where a string is valid.
                              while (charCode >= 32 && charCode != 92 && charCode != 34) {
                                charCode = source.charCodeAt(++Index);
                              }
                              // Append the string as-is.
                              value += source.slice(begin, Index);
                            }
                          }
                          if (source.charCodeAt(Index) == 34) {
                            // Advance to the next character and return the revived string.
                            Index++;
                            return value;
                          }
                          // Unterminated string.
                          abort();
                        default:
                          // Parse numbers and literals.
                          begin = Index;
                          // Advance past the negative sign, if one is specified.
                          if (charCode == 45) {
                            isSigned = true;
                            charCode = source.charCodeAt(++Index);
                          }
                          // Parse an integer or floating-point value.
                          if (charCode >= 48 && charCode <= 57) {
                            // Leading zeroes are interpreted as octal literals.
                            if (charCode == 48 && (charCode = source.charCodeAt(Index + 1), charCode >= 48 && charCode <= 57)) {
                              // Illegal octal literal.
                              abort();
                            }
                            isSigned = false;
                            // Parse the integer component.
                            for (; Index < length && (charCode = source.charCodeAt(Index), charCode >= 48 && charCode <= 57); Index++) {}
                            // Floats cannot contain a leading decimal point; however, this
                            // case is already accounted for by the parser.
                            if (source.charCodeAt(Index) == 46) {
                              position = ++Index;
                              // Parse the decimal component.
                              for (; position < length && (charCode = source.charCodeAt(position), charCode >= 48 && charCode <= 57); position++) {}
                              if (position == Index) {
                                // Illegal trailing decimal.
                                abort();
                              }
                              Index = position;
                            }
                            // Parse exponents. The `e` denoting the exponent is
                            // case-insensitive.
                            charCode = source.charCodeAt(Index);
                            if (charCode == 101 || charCode == 69) {
                              charCode = source.charCodeAt(++Index);
                              // Skip past the sign following the exponent, if one is
                              // specified.
                              if (charCode == 43 || charCode == 45) {
                                Index++;
                              }
                              // Parse the exponential component.
                              for (position = Index; position < length && (charCode = source.charCodeAt(position), charCode >= 48 && charCode <= 57); position++) {}
                              if (position == Index) {
                                // Illegal empty exponent.
                                abort();
                              }
                              Index = position;
                            }
                            // Coerce the parsed value to a JavaScript number.
                            return +source.slice(begin, Index);
                          }
                          // A negative sign may only precede numbers.
                          if (isSigned) {
                            abort();
                          }
                          // `true`, `false`, and `null` literals.
                          if (source.slice(Index, Index + 4) == "true") {
                            Index += 4;
                            return true;
                          } else if (source.slice(Index, Index + 5) == "false") {
                            Index += 5;
                            return false;
                          } else if (source.slice(Index, Index + 4) == "null") {
                            Index += 4;
                            return null;
                          }
                          // Unrecognized token.
                          abort();
                      }
                    }
                    // Return the sentinel `$` character if the parser has reached the end
                    // of the source string.
                    return "$";
                  };

                  // Internal: Parses a JSON `value` token.
                  var get = function get(value) {
                    var results, hasMembers;
                    if (value == "$") {
                      // Unexpected end of input.
                      abort();
                    }
                    if (typeof value == "string") {
                      if ((charIndexBuggy ? value.charAt(0) : value[0]) == "@") {
                        // Remove the sentinel `@` character.
                        return value.slice(1);
                      }
                      // Parse object and array literals.
                      if (value == "[") {
                        // Parses a JSON array, returning a new JavaScript array.
                        results = [];
                        for (;; hasMembers || (hasMembers = true)) {
                          value = lex();
                          // A closing square bracket marks the end of the array literal.
                          if (value == "]") {
                            break;
                          }
                          // If the array literal contains elements, the current token
                          // should be a comma separating the previous element from the
                          // next.
                          if (hasMembers) {
                            if (value == ",") {
                              value = lex();
                              if (value == "]") {
                                // Unexpected trailing `,` in array literal.
                                abort();
                              }
                            } else {
                              // A `,` must separate each array element.
                              abort();
                            }
                          }
                          // Elisions and leading commas are not permitted.
                          if (value == ",") {
                            abort();
                          }
                          results.push(get(value));
                        }
                        return results;
                      } else if (value == "{") {
                        // Parses a JSON object, returning a new JavaScript object.
                        results = {};
                        for (;; hasMembers || (hasMembers = true)) {
                          value = lex();
                          // A closing curly brace marks the end of the object literal.
                          if (value == "}") {
                            break;
                          }
                          // If the object literal contains members, the current token
                          // should be a comma separator.
                          if (hasMembers) {
                            if (value == ",") {
                              value = lex();
                              if (value == "}") {
                                // Unexpected trailing `,` in object literal.
                                abort();
                              }
                            } else {
                              // A `,` must separate each object member.
                              abort();
                            }
                          }
                          // Leading commas are not permitted, object property names must be
                          // double-quoted strings, and a `:` must separate each property
                          // name and value.
                          if (value == "," || typeof value != "string" || (charIndexBuggy ? value.charAt(0) : value[0]) != "@" || lex() != ":") {
                            abort();
                          }
                          results[value.slice(1)] = get(lex());
                        }
                        return results;
                      }
                      // Unexpected token encountered.
                      abort();
                    }
                    return value;
                  };

                  // Internal: Updates a traversed object member.
                  var update = function update(source, property, callback) {
                    var element = walk(source, property, callback);
                    if (element === undef) {
                      delete source[property];
                    } else {
                      source[property] = element;
                    }
                  };

                  // Internal: Recursively traverses a parsed JSON object, invoking the
                  // `callback` function for each value. This is an implementation of the
                  // `Walk(holder, name)` operation defined in ES 5.1 section 15.12.2.
                  var walk = function walk(source, property, callback) {
                    var value = source[property],
                        length;
                    if ((typeof value === "undefined" ? "undefined" : _typeof(value)) == "object" && value) {
                      // `forEach` can't be used to traverse an array in Opera <= 8.54
                      // because its `Object#hasOwnProperty` implementation returns `false`
                      // for array indices (e.g., `![1, 2, 3].hasOwnProperty("0")`).
                      if (getClass.call(value) == arrayClass) {
                        for (length = value.length; length--;) {
                          update(value, length, callback);
                        }
                      } else {
                        _forEach(value, function (property) {
                          update(value, property, callback);
                        });
                      }
                    }
                    return callback.call(source, property, value);
                  };

                  // Public: `JSON.parse`. See ES 5.1 section 15.12.2.
                  exports.parse = function (source, callback) {
                    var result, value;
                    Index = 0;
                    Source = "" + source;
                    result = get(lex());
                    // If a JSON string contains multiple tokens, it is invalid.
                    if (lex() != "$") {
                      abort();
                    }
                    // Reset the parser state.
                    Index = Source = null;
                    return callback && getClass.call(callback) == functionClass ? walk((value = {}, value[""] = result, value), "", callback) : result;
                  };
                }
              }

              exports["runInContext"] = runInContext;
              return exports;
            }

            if (freeExports && !isLoader) {
              // Export for CommonJS environments.
              runInContext(root, freeExports);
            } else {
              // Export for web browsers and JavaScript engines.
              var nativeJSON = root.JSON,
                  previousJSON = root["JSON3"],
                  isRestored = false;

              var JSON3 = runInContext(root, root["JSON3"] = {
                // Public: Restores the original value of the global `JSON` object and
                // returns a reference to the `JSON3` object.
                "noConflict": function noConflict() {
                  if (!isRestored) {
                    isRestored = true;
                    root.JSON = nativeJSON;
                    root["JSON3"] = previousJSON;
                    nativeJSON = previousJSON = null;
                  }
                  return JSON3;
                }
              });

              root.JSON = {
                "parse": JSON3.parse,
                "stringify": JSON3.stringify
              };
            }

            // Export for asynchronous module loaders.
            if (isLoader) {
              define(function () {
                return JSON3;
              });
            }
          }).call(this);
        }).call(this, typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {});
      }, {}], 36: [function (_dereq_, module, exports) {
        /**
         * Helpers.
         */

        var s = 1000;
        var m = s * 60;
        var h = m * 60;
        var d = h * 24;
        var y = d * 365.25;

        /**
         * Parse or format the given `val`.
         *
         * Options:
         *
         *  - `long` verbose formatting [false]
         *
         * @param {String|Number} val
         * @param {Object} options
         * @return {String|Number}
         * @api public
         */

        module.exports = function (val, options) {
          options = options || {};
          if ('string' == typeof val) return parse(val);
          return options.long ? long(val) : short(val);
        };

        /**
         * Parse the given `str` and return milliseconds.
         *
         * @param {String} str
         * @return {Number}
         * @api private
         */

        function parse(str) {
          str = '' + str;
          if (str.length > 10000) return;
          var match = /^((?:\d+)?\.?\d+) *(milliseconds?|msecs?|ms|seconds?|secs?|s|minutes?|mins?|m|hours?|hrs?|h|days?|d|years?|yrs?|y)?$/i.exec(str);
          if (!match) return;
          var n = parseFloat(match[1]);
          var type = (match[2] || 'ms').toLowerCase();
          switch (type) {
            case 'years':
            case 'year':
            case 'yrs':
            case 'yr':
            case 'y':
              return n * y;
            case 'days':
            case 'day':
            case 'd':
              return n * d;
            case 'hours':
            case 'hour':
            case 'hrs':
            case 'hr':
            case 'h':
              return n * h;
            case 'minutes':
            case 'minute':
            case 'mins':
            case 'min':
            case 'm':
              return n * m;
            case 'seconds':
            case 'second':
            case 'secs':
            case 'sec':
            case 's':
              return n * s;
            case 'milliseconds':
            case 'millisecond':
            case 'msecs':
            case 'msec':
            case 'ms':
              return n;
          }
        }

        /**
         * Short format for `ms`.
         *
         * @param {Number} ms
         * @return {String}
         * @api private
         */

        function short(ms) {
          if (ms >= d) return Math.round(ms / d) + 'd';
          if (ms >= h) return Math.round(ms / h) + 'h';
          if (ms >= m) return Math.round(ms / m) + 'm';
          if (ms >= s) return Math.round(ms / s) + 's';
          return ms + 'ms';
        }

        /**
         * Long format for `ms`.
         *
         * @param {Number} ms
         * @return {String}
         * @api private
         */

        function long(ms) {
          return plural(ms, d, 'day') || plural(ms, h, 'hour') || plural(ms, m, 'minute') || plural(ms, s, 'second') || ms + ' ms';
        }

        /**
         * Pluralization helper.
         */

        function plural(ms, n, name) {
          if (ms < n) return;
          if (ms < n * 1.5) return Math.floor(ms / n) + ' ' + name;
          return Math.ceil(ms / n) + ' ' + name + 's';
        }
      }, {}], 37: [function (_dereq_, module, exports) {
        (function (global) {
          /**
           * JSON parse.
           *
           * @see Based on jQuery#parseJSON (MIT) and JSON2
           * @api private
           */

          var rvalidchars = /^[\],:{}\s]*$/;
          var rvalidescape = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g;
          var rvalidtokens = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g;
          var rvalidbraces = /(?:^|:|,)(?:\s*\[)+/g;
          var rtrimLeft = /^\s+/;
          var rtrimRight = /\s+$/;

          module.exports = function parsejson(data) {
            if ('string' != typeof data || !data) {
              return null;
            }

            data = data.replace(rtrimLeft, '').replace(rtrimRight, '');

            // Attempt to parse using the native JSON parser first
            if (global.JSON && JSON.parse) {
              return JSON.parse(data);
            }

            if (rvalidchars.test(data.replace(rvalidescape, '@').replace(rvalidtokens, ']').replace(rvalidbraces, ''))) {
              return new Function('return ' + data)();
            }
          };
        }).call(this, typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {});
      }, {}], 38: [function (_dereq_, module, exports) {
        /**
         * Compiles a querystring
         * Returns string representation of the object
         *
         * @param {Object}
         * @api private
         */

        exports.encode = function (obj) {
          var str = '';

          for (var i in obj) {
            if (obj.hasOwnProperty(i)) {
              if (str.length) str += '&';
              str += encodeURIComponent(i) + '=' + encodeURIComponent(obj[i]);
            }
          }

          return str;
        };

        /**
         * Parses a simple querystring into an object
         *
         * @param {String} qs
         * @api private
         */

        exports.decode = function (qs) {
          var qry = {};
          var pairs = qs.split('&');
          for (var i = 0, l = pairs.length; i < l; i++) {
            var pair = pairs[i].split('=');
            qry[decodeURIComponent(pair[0])] = decodeURIComponent(pair[1]);
          }
          return qry;
        };
      }, {}], 39: [function (_dereq_, module, exports) {
        /**
         * Parses an URI
         *
         * @author Steven Levithan <stevenlevithan.com> (MIT license)
         * @api private
         */

        var re = /^(?:(?![^:@]+:[^:@\/]*@)(http|https|ws|wss):\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?((?:[a-f0-9]{0,4}:){2,7}[a-f0-9]{0,4}|[^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/;

        var parts = ['source', 'protocol', 'authority', 'userInfo', 'user', 'password', 'host', 'port', 'relative', 'path', 'directory', 'file', 'query', 'anchor'];

        module.exports = function parseuri(str) {
          var src = str,
              b = str.indexOf('['),
              e = str.indexOf(']');

          if (b != -1 && e != -1) {
            str = str.substring(0, b) + str.substring(b, e).replace(/:/g, ';') + str.substring(e, str.length);
          }

          var m = re.exec(str || ''),
              uri = {},
              i = 14;

          while (i--) {
            uri[parts[i]] = m[i] || '';
          }

          if (b != -1 && e != -1) {
            uri.source = src;
            uri.host = uri.host.substring(1, uri.host.length - 1).replace(/;/g, ':');
            uri.authority = uri.authority.replace('[', '').replace(']', '').replace(/;/g, ':');
            uri.ipv6uri = true;
          }

          return uri;
        };
      }, {}], 40: [function (_dereq_, module, exports) {
        (function (global) {
          /*global Blob,File*/

          /**
           * Module requirements
           */

          var isArray = _dereq_('isarray');
          var isBuf = _dereq_('./is-buffer');

          /**
           * Replaces every Buffer | ArrayBuffer in packet with a numbered placeholder.
           * Anything with blobs or files should be fed through removeBlobs before coming
           * here.
           *
           * @param {Object} packet - socket.io event packet
           * @return {Object} with deconstructed packet and list of buffers
           * @api public
           */

          exports.deconstructPacket = function (packet) {
            var buffers = [];
            var packetData = packet.data;

            function _deconstructPacket(data) {
              if (!data) return data;

              if (isBuf(data)) {
                var placeholder = { _placeholder: true, num: buffers.length };
                buffers.push(data);
                return placeholder;
              } else if (isArray(data)) {
                var newData = new Array(data.length);
                for (var i = 0; i < data.length; i++) {
                  newData[i] = _deconstructPacket(data[i]);
                }
                return newData;
              } else if ('object' == (typeof data === "undefined" ? "undefined" : _typeof(data)) && !(data instanceof Date)) {
                var newData = {};
                for (var key in data) {
                  newData[key] = _deconstructPacket(data[key]);
                }
                return newData;
              }
              return data;
            }

            var pack = packet;
            pack.data = _deconstructPacket(packetData);
            pack.attachments = buffers.length; // number of binary 'attachments'
            return { packet: pack, buffers: buffers };
          };

          /**
           * Reconstructs a binary packet from its placeholder packet and buffers
           *
           * @param {Object} packet - event packet with placeholders
           * @param {Array} buffers - binary buffers to put in placeholder positions
           * @return {Object} reconstructed packet
           * @api public
           */

          exports.reconstructPacket = function (packet, buffers) {
            var curPlaceHolder = 0;

            function _reconstructPacket(data) {
              if (data && data._placeholder) {
                var buf = buffers[data.num]; // appropriate buffer (should be natural order anyway)
                return buf;
              } else if (isArray(data)) {
                for (var i = 0; i < data.length; i++) {
                  data[i] = _reconstructPacket(data[i]);
                }
                return data;
              } else if (data && 'object' == (typeof data === "undefined" ? "undefined" : _typeof(data))) {
                for (var key in data) {
                  data[key] = _reconstructPacket(data[key]);
                }
                return data;
              }
              return data;
            }

            packet.data = _reconstructPacket(packet.data);
            packet.attachments = undefined; // no longer useful
            return packet;
          };

          /**
           * Asynchronously removes Blobs or Files from data via
           * FileReader's readAsArrayBuffer method. Used before encoding
           * data as msgpack. Calls callback with the blobless data.
           *
           * @param {Object} data
           * @param {Function} callback
           * @api private
           */

          exports.removeBlobs = function (data, callback) {
            function _removeBlobs(obj, curKey, containingObject) {
              if (!obj) return obj;

              // convert any blob
              if (global.Blob && obj instanceof Blob || global.File && obj instanceof File) {
                pendingBlobs++;

                // async filereader
                var fileReader = new FileReader();
                fileReader.onload = function () {
                  // this.result == arraybuffer
                  if (containingObject) {
                    containingObject[curKey] = this.result;
                  } else {
                    bloblessData = this.result;
                  }

                  // if nothing pending its callback time
                  if (! --pendingBlobs) {
                    callback(bloblessData);
                  }
                };

                fileReader.readAsArrayBuffer(obj); // blob -> arraybuffer
              } else if (isArray(obj)) {
                // handle array
                for (var i = 0; i < obj.length; i++) {
                  _removeBlobs(obj[i], i, obj);
                }
              } else if (obj && 'object' == (typeof obj === "undefined" ? "undefined" : _typeof(obj)) && !isBuf(obj)) {
                // and object
                for (var key in obj) {
                  _removeBlobs(obj[key], key, obj);
                }
              }
            }

            var pendingBlobs = 0;
            var bloblessData = data;
            _removeBlobs(bloblessData);
            if (!pendingBlobs) {
              callback(bloblessData);
            }
          };
        }).call(this, typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {});
      }, { "./is-buffer": 42, "isarray": 34 }], 41: [function (_dereq_, module, exports) {

        /**
         * Module dependencies.
         */

        var debug = _dereq_('debug')('socket.io-parser');
        var json = _dereq_('json3');
        var isArray = _dereq_('isarray');
        var Emitter = _dereq_('component-emitter');
        var binary = _dereq_('./binary');
        var isBuf = _dereq_('./is-buffer');

        /**
         * Protocol version.
         *
         * @api public
         */

        exports.protocol = 4;

        /**
         * Packet types.
         *
         * @api public
         */

        exports.types = ['CONNECT', 'DISCONNECT', 'EVENT', 'BINARY_EVENT', 'ACK', 'BINARY_ACK', 'ERROR'];

        /**
         * Packet type `connect`.
         *
         * @api public
         */

        exports.CONNECT = 0;

        /**
         * Packet type `disconnect`.
         *
         * @api public
         */

        exports.DISCONNECT = 1;

        /**
         * Packet type `event`.
         *
         * @api public
         */

        exports.EVENT = 2;

        /**
         * Packet type `ack`.
         *
         * @api public
         */

        exports.ACK = 3;

        /**
         * Packet type `error`.
         *
         * @api public
         */

        exports.ERROR = 4;

        /**
         * Packet type 'binary event'
         *
         * @api public
         */

        exports.BINARY_EVENT = 5;

        /**
         * Packet type `binary ack`. For acks with binary arguments.
         *
         * @api public
         */

        exports.BINARY_ACK = 6;

        /**
         * Encoder constructor.
         *
         * @api public
         */

        exports.Encoder = Encoder;

        /**
         * Decoder constructor.
         *
         * @api public
         */

        exports.Decoder = Decoder;

        /**
         * A socket.io Encoder instance
         *
         * @api public
         */

        function Encoder() {}

        /**
         * Encode a packet as a single string if non-binary, or as a
         * buffer sequence, depending on packet type.
         *
         * @param {Object} obj - packet object
         * @param {Function} callback - function to handle encodings (likely engine.write)
         * @return Calls callback with Array of encodings
         * @api public
         */

        Encoder.prototype.encode = function (obj, callback) {
          debug('encoding packet %j', obj);

          if (exports.BINARY_EVENT == obj.type || exports.BINARY_ACK == obj.type) {
            encodeAsBinary(obj, callback);
          } else {
            var encoding = encodeAsString(obj);
            callback([encoding]);
          }
        };

        /**
         * Encode packet as string.
         *
         * @param {Object} packet
         * @return {String} encoded
         * @api private
         */

        function encodeAsString(obj) {
          var str = '';
          var nsp = false;

          // first is type
          str += obj.type;

          // attachments if we have them
          if (exports.BINARY_EVENT == obj.type || exports.BINARY_ACK == obj.type) {
            str += obj.attachments;
            str += '-';
          }

          // if we have a namespace other than `/`
          // we append it followed by a comma `,`
          if (obj.nsp && '/' != obj.nsp) {
            nsp = true;
            str += obj.nsp;
          }

          // immediately followed by the id
          if (null != obj.id) {
            if (nsp) {
              str += ',';
              nsp = false;
            }
            str += obj.id;
          }

          // json data
          if (null != obj.data) {
            if (nsp) str += ',';
            str += json.stringify(obj.data);
          }

          debug('encoded %j as %s', obj, str);
          return str;
        }

        /**
         * Encode packet as 'buffer sequence' by removing blobs, and
         * deconstructing packet into object with placeholders and
         * a list of buffers.
         *
         * @param {Object} packet
         * @return {Buffer} encoded
         * @api private
         */

        function encodeAsBinary(obj, callback) {

          function writeEncoding(bloblessData) {
            var deconstruction = binary.deconstructPacket(bloblessData);
            var pack = encodeAsString(deconstruction.packet);
            var buffers = deconstruction.buffers;

            buffers.unshift(pack); // add packet info to beginning of data list
            callback(buffers); // write all the buffers
          }

          binary.removeBlobs(obj, writeEncoding);
        }

        /**
         * A socket.io Decoder instance
         *
         * @return {Object} decoder
         * @api public
         */

        function Decoder() {
          this.reconstructor = null;
        }

        /**
         * Mix in `Emitter` with Decoder.
         */

        Emitter(Decoder.prototype);

        /**
         * Decodes an ecoded packet string into packet JSON.
         *
         * @param {String} obj - encoded packet
         * @return {Object} packet
         * @api public
         */

        Decoder.prototype.add = function (obj) {
          var packet;
          if ('string' == typeof obj) {
            packet = decodeString(obj);
            if (exports.BINARY_EVENT == packet.type || exports.BINARY_ACK == packet.type) {
              // binary packet's json
              this.reconstructor = new BinaryReconstructor(packet);

              // no attachments, labeled binary but no binary data to follow
              if (this.reconstructor.reconPack.attachments === 0) {
                this.emit('decoded', packet);
              }
            } else {
              // non-binary full packet
              this.emit('decoded', packet);
            }
          } else if (isBuf(obj) || obj.base64) {
            // raw binary data
            if (!this.reconstructor) {
              throw new Error('got binary data when not reconstructing a packet');
            } else {
              packet = this.reconstructor.takeBinaryData(obj);
              if (packet) {
                // received final buffer
                this.reconstructor = null;
                this.emit('decoded', packet);
              }
            }
          } else {
            throw new Error('Unknown type: ' + obj);
          }
        };

        /**
         * Decode a packet String (JSON data)
         *
         * @param {String} str
         * @return {Object} packet
         * @api private
         */

        function decodeString(str) {
          var p = {};
          var i = 0;

          // look up type
          p.type = Number(str.charAt(0));
          if (null == exports.types[p.type]) return error();

          // look up attachments if type binary
          if (exports.BINARY_EVENT == p.type || exports.BINARY_ACK == p.type) {
            var buf = '';
            while (str.charAt(++i) != '-') {
              buf += str.charAt(i);
              if (i == str.length) break;
            }
            if (buf != Number(buf) || str.charAt(i) != '-') {
              throw new Error('Illegal attachments');
            }
            p.attachments = Number(buf);
          }

          // look up namespace (if any)
          if ('/' == str.charAt(i + 1)) {
            p.nsp = '';
            while (++i) {
              var c = str.charAt(i);
              if (',' == c) break;
              p.nsp += c;
              if (i == str.length) break;
            }
          } else {
            p.nsp = '/';
          }

          // look up id
          var next = str.charAt(i + 1);
          if ('' !== next && Number(next) == next) {
            p.id = '';
            while (++i) {
              var c = str.charAt(i);
              if (null == c || Number(c) != c) {
                --i;
                break;
              }
              p.id += str.charAt(i);
              if (i == str.length) break;
            }
            p.id = Number(p.id);
          }

          // look up json data
          if (str.charAt(++i)) {
            try {
              p.data = json.parse(str.substr(i));
            } catch (e) {
              return error();
            }
          }

          debug('decoded %s as %j', str, p);
          return p;
        }

        /**
         * Deallocates a parser's resources
         *
         * @api public
         */

        Decoder.prototype.destroy = function () {
          if (this.reconstructor) {
            this.reconstructor.finishedReconstruction();
          }
        };

        /**
         * A manager of a binary event's 'buffer sequence'. Should
         * be constructed whenever a packet of type BINARY_EVENT is
         * decoded.
         *
         * @param {Object} packet
         * @return {BinaryReconstructor} initialized reconstructor
         * @api private
         */

        function BinaryReconstructor(packet) {
          this.reconPack = packet;
          this.buffers = [];
        }

        /**
         * Method to be called when binary data received from connection
         * after a BINARY_EVENT packet.
         *
         * @param {Buffer | ArrayBuffer} binData - the raw binary data received
         * @return {null | Object} returns null if more binary data is expected or
         *   a reconstructed packet object if all buffers have been received.
         * @api private
         */

        BinaryReconstructor.prototype.takeBinaryData = function (binData) {
          this.buffers.push(binData);
          if (this.buffers.length == this.reconPack.attachments) {
            // done with buffer list
            var packet = binary.reconstructPacket(this.reconPack, this.buffers);
            this.finishedReconstruction();
            return packet;
          }
          return null;
        };

        /**
         * Cleans up binary packet reconstruction variables.
         *
         * @api private
         */

        BinaryReconstructor.prototype.finishedReconstruction = function () {
          this.reconPack = null;
          this.buffers = [];
        };

        function error(data) {
          return {
            type: exports.ERROR,
            data: 'parser error'
          };
        }
      }, { "./binary": 40, "./is-buffer": 42, "component-emitter": 43, "debug": 14, "isarray": 34, "json3": 35 }], 42: [function (_dereq_, module, exports) {
        (function (global) {

          module.exports = isBuf;

          /**
           * Returns true if obj is a buffer or an arraybuffer.
           *
           * @api private
           */

          function isBuf(obj) {
            return global.Buffer && global.Buffer.isBuffer(obj) || global.ArrayBuffer && obj instanceof ArrayBuffer;
          }
        }).call(this, typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {});
      }, {}], 43: [function (_dereq_, module, exports) {
        module.exports = _dereq_(26);
      }, {}], 44: [function (_dereq_, module, exports) {
        module.exports = toArray;

        function toArray(list, index) {
          var array = [];

          index = index || 0;

          for (var i = index || 0; i < list.length; i++) {
            array[i - index] = list[i];
          }

          return array;
        }
      }, {}], 45: [function (_dereq_, module, exports) {
        (function (global) {
          /*! https://mths.be/utf8js v2.0.0 by @mathias */
          ;(function (root) {

            // Detect free variables `exports`
            var freeExports = (typeof exports === "undefined" ? "undefined" : _typeof(exports)) == 'object' && exports;

            // Detect free variable `module`
            var freeModule = (typeof module === "undefined" ? "undefined" : _typeof(module)) == 'object' && module && module.exports == freeExports && module;

            // Detect free variable `global`, from Node.js or Browserified code,
            // and use it as `root`
            var freeGlobal = (typeof global === "undefined" ? "undefined" : _typeof(global)) == 'object' && global;
            if (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal) {
              root = freeGlobal;
            }

            /*--------------------------------------------------------------------------*/

            var stringFromCharCode = String.fromCharCode;

            // Taken from https://mths.be/punycode
            function ucs2decode(string) {
              var output = [];
              var counter = 0;
              var length = string.length;
              var value;
              var extra;
              while (counter < length) {
                value = string.charCodeAt(counter++);
                if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
                  // high surrogate, and there is a next character
                  extra = string.charCodeAt(counter++);
                  if ((extra & 0xFC00) == 0xDC00) {
                    // low surrogate
                    output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
                  } else {
                    // unmatched surrogate; only append this code unit, in case the next
                    // code unit is the high surrogate of a surrogate pair
                    output.push(value);
                    counter--;
                  }
                } else {
                  output.push(value);
                }
              }
              return output;
            }

            // Taken from https://mths.be/punycode
            function ucs2encode(array) {
              var length = array.length;
              var index = -1;
              var value;
              var output = '';
              while (++index < length) {
                value = array[index];
                if (value > 0xFFFF) {
                  value -= 0x10000;
                  output += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);
                  value = 0xDC00 | value & 0x3FF;
                }
                output += stringFromCharCode(value);
              }
              return output;
            }

            function checkScalarValue(codePoint) {
              if (codePoint >= 0xD800 && codePoint <= 0xDFFF) {
                throw Error('Lone surrogate U+' + codePoint.toString(16).toUpperCase() + ' is not a scalar value');
              }
            }
            /*--------------------------------------------------------------------------*/

            function createByte(codePoint, shift) {
              return stringFromCharCode(codePoint >> shift & 0x3F | 0x80);
            }

            function encodeCodePoint(codePoint) {
              if ((codePoint & 0xFFFFFF80) == 0) {
                // 1-byte sequence
                return stringFromCharCode(codePoint);
              }
              var symbol = '';
              if ((codePoint & 0xFFFFF800) == 0) {
                // 2-byte sequence
                symbol = stringFromCharCode(codePoint >> 6 & 0x1F | 0xC0);
              } else if ((codePoint & 0xFFFF0000) == 0) {
                // 3-byte sequence
                checkScalarValue(codePoint);
                symbol = stringFromCharCode(codePoint >> 12 & 0x0F | 0xE0);
                symbol += createByte(codePoint, 6);
              } else if ((codePoint & 0xFFE00000) == 0) {
                // 4-byte sequence
                symbol = stringFromCharCode(codePoint >> 18 & 0x07 | 0xF0);
                symbol += createByte(codePoint, 12);
                symbol += createByte(codePoint, 6);
              }
              symbol += stringFromCharCode(codePoint & 0x3F | 0x80);
              return symbol;
            }

            function utf8encode(string) {
              var codePoints = ucs2decode(string);
              var length = codePoints.length;
              var index = -1;
              var codePoint;
              var byteString = '';
              while (++index < length) {
                codePoint = codePoints[index];
                byteString += encodeCodePoint(codePoint);
              }
              return byteString;
            }

            /*--------------------------------------------------------------------------*/

            function readContinuationByte() {
              if (byteIndex >= byteCount) {
                throw Error('Invalid byte index');
              }

              var continuationByte = byteArray[byteIndex] & 0xFF;
              byteIndex++;

              if ((continuationByte & 0xC0) == 0x80) {
                return continuationByte & 0x3F;
              }

              // If we end up here, it’s not a continuation byte
              throw Error('Invalid continuation byte');
            }

            function decodeSymbol() {
              var byte1;
              var byte2;
              var byte3;
              var byte4;
              var codePoint;

              if (byteIndex > byteCount) {
                throw Error('Invalid byte index');
              }

              if (byteIndex == byteCount) {
                return false;
              }

              // Read first byte
              byte1 = byteArray[byteIndex] & 0xFF;
              byteIndex++;

              // 1-byte sequence (no continuation bytes)
              if ((byte1 & 0x80) == 0) {
                return byte1;
              }

              // 2-byte sequence
              if ((byte1 & 0xE0) == 0xC0) {
                var byte2 = readContinuationByte();
                codePoint = (byte1 & 0x1F) << 6 | byte2;
                if (codePoint >= 0x80) {
                  return codePoint;
                } else {
                  throw Error('Invalid continuation byte');
                }
              }

              // 3-byte sequence (may include unpaired surrogates)
              if ((byte1 & 0xF0) == 0xE0) {
                byte2 = readContinuationByte();
                byte3 = readContinuationByte();
                codePoint = (byte1 & 0x0F) << 12 | byte2 << 6 | byte3;
                if (codePoint >= 0x0800) {
                  checkScalarValue(codePoint);
                  return codePoint;
                } else {
                  throw Error('Invalid continuation byte');
                }
              }

              // 4-byte sequence
              if ((byte1 & 0xF8) == 0xF0) {
                byte2 = readContinuationByte();
                byte3 = readContinuationByte();
                byte4 = readContinuationByte();
                codePoint = (byte1 & 0x0F) << 0x12 | byte2 << 0x0C | byte3 << 0x06 | byte4;
                if (codePoint >= 0x010000 && codePoint <= 0x10FFFF) {
                  return codePoint;
                }
              }

              throw Error('Invalid UTF-8 detected');
            }

            var byteArray;
            var byteCount;
            var byteIndex;
            function utf8decode(byteString) {
              byteArray = ucs2decode(byteString);
              byteCount = byteArray.length;
              byteIndex = 0;
              var codePoints = [];
              var tmp;
              while ((tmp = decodeSymbol()) !== false) {
                codePoints.push(tmp);
              }
              return ucs2encode(codePoints);
            }

            /*--------------------------------------------------------------------------*/

            var utf8 = {
              'version': '2.0.0',
              'encode': utf8encode,
              'decode': utf8decode
            };

            // Some AMD build optimizers, like r.js, check for specific condition patterns
            // like the following:
            if (typeof define == 'function' && _typeof(define.amd) == 'object' && define.amd) {
              define(function () {
                return utf8;
              });
            } else if (freeExports && !freeExports.nodeType) {
              if (freeModule) {
                // in Node.js or RingoJS v0.8.0+
                freeModule.exports = utf8;
              } else {
                // in Narwhal or RingoJS v0.7.0-
                var object = {};
                var hasOwnProperty = object.hasOwnProperty;
                for (var key in utf8) {
                  hasOwnProperty.call(utf8, key) && (freeExports[key] = utf8[key]);
                }
              }
            } else {
              // in Rhino or a web browser
              root.utf8 = utf8;
            }
          })(this);
        }).call(this, typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {});
      }, {}], 46: [function (_dereq_, module, exports) {

        /**
         * Module dependencies.
         */

        var global = function () {
          return this;
        }();

        /**
         * WebSocket constructor.
         */

        var WebSocket = global.WebSocket || global.MozWebSocket;

        /**
         * Module exports.
         */

        module.exports = WebSocket ? ws : null;

        /**
         * WebSocket constructor.
         *
         * The third `opts` options object gets ignored in web browsers, since it's
         * non-standard, and throws a TypeError if passed to the constructor.
         * See: https://github.com/einaros/ws/issues/227
         *
         * @param {String} uri
         * @param {Array} protocols (optional)
         * @param {Object) opts (optional)
         * @api public
         */

        function ws(uri, protocols, opts) {
          var instance;
          if (protocols) {
            instance = new WebSocket(uri, protocols);
          } else {
            instance = new WebSocket(uri);
          }
          return instance;
        }

        if (WebSocket) ws.prototype = WebSocket.prototype;
      }, {}], 47: [function (_dereq_, module, exports) {
        'use strict';

        var alphabet = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_'.split(''),
            length = 64,
            map = {},
            seed = 0,
            i = 0,
            prev;

        /**
         * Return a string representing the specified number.
         *
         * @param {Number} num The number to convert.
         * @returns {String} The string representation of the number.
         * @api public
         */
        function encode(num) {
          var encoded = '';

          do {
            encoded = alphabet[num % length] + encoded;
            num = Math.floor(num / length);
          } while (num > 0);

          return encoded;
        }

        /**
         * Return the integer value specified by the given string.
         *
         * @param {String} str The string to convert.
         * @returns {Number} The integer value represented by the string.
         * @api public
         */
        function decode(str) {
          var decoded = 0;

          for (i = 0; i < str.length; i++) {
            decoded = decoded * length + map[str.charAt(i)];
          }

          return decoded;
        }

        /**
         * Yeast: A tiny growing id generator.
         *
         * @returns {String} A unique id.
         * @api public
         */
        function yeast() {
          var now = encode(+new Date());

          if (now !== prev) return seed = 0, prev = now;
          return now + '.' + encode(seed++);
        }

        //
        // Map each character to its index.
        //
        for (; i < length; i++) {
          map[alphabet[i]] = i;
        } //
        // Expose the `yeast`, `encode` and `decode` functions.
        //
        yeast.encode = encode;
        yeast.decode = decode;
        module.exports = yeast;
      }, {}] }, {}, [1])(1);
  });
}

cc._RF.pop();